Please help me with these questions

C webassign.net water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo MY NOTES ASK YOUR TEACHER 3. [-/5 Points] DETAILS MENDSTAT14 7.E.045. An advertiser claims that the average percentage of brown M&M'S candies in a package of milk chocolate M&M'S is 12%. Suppose you randomly select a package of milk chocolate M&M'S that contains 50 candies and determine the proportion of brown candies in the package. (a) What is the approximate distribution of the sample proportion of brown candies in a package that contains 50 candies? The distribution is approximated by a normal distribution with mean 0.12 and standard deviation 0.0460. The distribution is approximated by a normal distribution with mean 6.0 and standard deviation 600. The distribution is approximated by a normal distribution with mean 0.12 and standard deviation 0.88. The distribution is approximated by a normal distribution with mean 12 and standard deviation 0.0460. The distribution is binomial and cannot be approximated. (b) What is the probability that the sample percentage of brown candies is less than 23%? (Round your answer to four decimal places.) (c) What is the probability that the sample percentage exceeds 32%? (Round your answer to four decimal places.) (d) Within what range would you expect the sample proportion to lie about 95% of the time? (Round your answers to two decimal places.) to You may need to use the appropriate appendix table or technology to answer this question. 4. [-/5 Points] DETAILS MENDSTAT14 7.E.049. MY NOTES ASK YOUR TEACHER The sample means were calculated for 40 samples of size n = 7 for a process that was judged to be in control. The means of the 40 values and the standard deviation of the combined 280 measurements were x = 153.5 and s = 4.4, respectively. (a) Use the data to determine the upper and lower control limits for an x chart. (Round your answers to two decimal places.)webassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo The sample means were calculated for 40 samples of size n = 7 for a process that was judged to be in control. The means of the 40 values and the standard deviation o combined 280 measurements were x = 153.5 and s = 4.4, respectively. (a) Use the data to determine the upper and lower control limits for an x chart. (Round your answers to two decimal places. ) UCL = LCL = (b) Construct an x chart for the process. Sample Sample Mean Mean 180 180 170 170 UCL 160 160 UCL 150 150 X 140 X 140 LCL 130 LCL 130 C Sample sample i Sample Sample Mean Mean 180 180 170 170 160 UCL 160webassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo 170 UCL 160 160 X UCL 150 150 LCL 140 140 LCL 130 130 Sample Sample Explain how the chart can be used. Values of x are plotted and should remain between the center line and LCL. If not, the process should be checked. Values of x are plotted and should remain outside the range between the UCL and LCL. If not, the process should be checked. Values of x are plotted and should remain between the UCL and center line. If not, the process should be checked. Values of x are plotted and should remain above the UCL. If not, the process should be checked. Values of x are plotted and should remain between the UCL and LCL. If not, the process should be checked. [-/5 Points] DETAILS MENDSTAT14 7.E.051. MY NOTES ASK YOUR TEAC proportions was 0.015. Samples of n = 100 items were selected hourly over a 100-hour period, and the sample proportion of defectives was calculated each hour. The mean of the 100 sample (a) Use the data to find the upper and lower control limits for a p chart. (Round your answers to three decimal places.) UCL = LCL =A webassign.net C r my lonestar lonestar's mail Facebook Apple Bing Google Yahoo 5. [-/5 Points] DETAILS MENDSTAT14 7.E.051. MY NOTES ASK YOUR TEA Samples of n = 100 items were selected hourly over a 100-hour period, and the sample proportion of defectives was calculated each hour. The mean of the 100 sample proportions was 0.015. (a) Use the data to find the upper and lower control limits for a p chart. (Round your answers to three decimal places.) UCL = LCL = (b) Construct a p chart for the process. Proportion Proportion 0.10 0.20 0.15 UCL UCL .05 .10 P A graph has a horizontal axis labeled "Day" and a vertical axis labeled "Proportion" with values from -0.01 to 0.2. There are LCL three horizontal lines on the graph. 0 . The bottom horizontal line is labeled "LCL" and intersects the vertical axis at about 0. Day . The middle horizontal line is labeled "p bar" and intersects the vertical axis at about 0.02. Ci . The top horizontal line is labeled "UCL" and intersects the vertical axis at about 0.15. Proportion Proportion 0.10 0.10webassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo Day Day OC Proportion Proportion 0.10 0.10 UCL 0.05 0.05 UCL LCL P LCL P Day Day C OC Explain how the chart can be used. Values of p are plotted and should remain below the center line. If not, the process should be checked. Values of p are plotted and should remain between the center line and the LCL. If not, the process should be checked. Values of p are plotted and should remain outside the control limits. If not, the process should be checked. Values of p are plotted and should remain between the center line and the UCL. If not, the process should be checked. Values of p are plotted and should remain within the control limits. If not, the process should be checked. 6. [-/5 Points] DETAILS MENDSTAT14 7.E.053. MY NOTES ASK YOUR TEACHERC webassign.net my lonestar lonestar's mail Facebook Apple Bing Google Yahoo MY NOTES ASK YOUR TEACH 6. [-/5 Points] DETAILS MENDSTAT14 7.E.053. A gambling casino records and plots the mean daily gain or loss from five blackjack tables on an x chart. The overall mean of the sample means and the standard deviation the combined data over 40 weeks were x = $10,941 and s = $1106, respectively. (a) Construct an x chart for the mean daily gain per blackjack table. Sample Sample Mean Mean 13 000 UCL 13 000 UCL 12 000 12 000 11 000 11 000 10 000 LCL 10 000 LCL 9000 9000 Week Week C Sample Sample Mean Mean 13 000 13 000 UCL UCL 12000 12 000 11 000 11 000 10 000 A graph has a horizontal axis labeled "Week" and a vertical axiswebassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo A graph has a horizontal axis labeled "Week" and a vertical axis 10 000 labeled "Sample Mean" with values from 7,500 to 13,400. There are three horizontal lines on the graph. 9000 . The bottom horizontal line is labeled "LCL" and intersects the LCL vertical axis at about 9,000. . The middle horizontal line is labeled "x bar" and intersects Week the vertical axis at about 10,900. . The top horizontal line is labeled "UCL" and intersects the C vertical axis at about 12,900. (b) How can this x chart be of value to the manager of the casino? The x chart will allow the manager to monitor the blackjack tables to see how many face cards are dealt. The x chart will allow the manager to monitor daily gains or losses to predict profits. The x chart will allow the manager to monitor the blackjack tables to see how many players participate in each game. The x chart will allow the manager to monitor individual players. The x chart will allow the manager to monitor daily gains or losses to see whether there is a problem with any particular table. 7. [-/8 Points] DETAILS MENDSTAT14 7.E.060. MY NOTES ASK YOUR TEACHE A finite population consists of four elements: 6, 2, 4, 3. (a) How many different samples of size n = 2 can be selected from this population if you sample without replacement? (Sampling is said to be without replacement if an element cannot be selected twice for the same sample.) samples (b) List the possible samples of size n = 2. (Enter your samples as a comma separated list. Use parentheses around each sample, For each sample, enter the elements as comma=separated list from smallest to largest.)C D webassign.net water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo 7. [-/8 Points] DETAILS MENDSTAT14 7.E.060. MY NOTES ASK YOUR TEACHE A finite population consists of four elements: 6, 2, 4, 3. (a) How many different samples of size n = 2 can be selected from this population if you sample without replacement? (Sampling is said to be without replacement if an element cannot be selected twice for the same sample.) samples (b) List the possible samples of size n = 2. (Enter your samples as a comma-separated list. Use parentheses around each sample. For each sample, enter the elements as comma-separated list from smallest to largest.) (c) Compute the sample mean for each of the samples given in part (b). (Enter your answers as a comma-separated list.) (d) Find the sampling distribution of x. Op(x) = = for all values of X Op(x) = = for all values of X Op ( x ) = = for x = 1, 2, 3, 4, 5, 6 OP ( x ) = f = _ for x = 1, 2, 3, 4, 5, 6 Op ( x ) = _ for x = 1 , 2 Use a probability histogram to graph the sampling distribution of X. Probability Probabilitywebassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo Use a probability histogram to graph the sampling distribution of x. Probability Probability 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 X C 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Probability Probability 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.05 0.05 C 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 H = (e) If all four population values are equally likely, calculate the value of the population mean u. (Enter your answer to two decimal places.) Do any of the samples listed in part (b) produce a value of x exactly equal to u? Yes, sample 1 produces a value of x equal to u. Yes, sample 2 produces a value of x equal to u.A webassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo LX X C 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Probability Probability 0.35 0.35 0.30 0.30 0.25 0.25 0.20 A histogram has a horizontal axis labeled "x bar" with values from 0.15 1.25 to 5.75 and a vertical axis labeled "Probability" with values 0.10 from 0 to 0.4. The histogram has 5 bars. Each bar is associated with a label and an approximate value as listed below. 0.05 2.5: 0.2 3: 0.2 X 3.5: 0.2 C 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 . 4.5: 0.2 . 5: 0.2 2 2.0 2.5 3.0 3.5 4.0 4.5 5.0 85.5 (e) If all four population values are equally likely, calculate the value of the population mean u. (Enter your answer to two decimal places.) H = Do any of the samples listed in part (b) produce a value of x exactly equal to u? Yes, sample 1 produces a value of x equal to u. Yes, sample 2 produces a value of x equal to u. Yes, sample 3 produces a value of x equal to u. Yes, sample 4 produces a value of x equal to u. Yes, sample 5 produces a value of x equal to u. Yes, sample 6 produces a value of x equal to u. ONone of the samples produce a value of x equal to u.webassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo . [-/4 Points] MENDSTAT14 7.E.075. MY NOTES ASK YOUR TEACHER DETAILS The number of wiring packages that can be assembled by a company's employees has a normal distribution, with a mean equal to 18.8 per hour and a standard deviation of 1.4 per hour. (a) What are the mean and standard deviation of the number x of packages produced per worker in an 8-hour day? (Round your standard deviation to three decimal places.) mean packages standard deviation packages (b) Do you expect the probability distribution for x to be mound-shaped and approximately normal? Explain. Yes, since the standard deviation is less than 3, the sampling distribution of the sum will be approximately normal. Yes, since the original population is normal, the sampling distribution of the sum will also be approximately normal. No, since the original population is not normal, the sampling distribution of the sum will not be approximately normal. O No, since the original population is normal, the sampling distribution of the sum cannot be normal. No, since the standard deviation is more than 3, the sampling distribution of the sum will not be approximately normal. (c) What is the probability that a worker will produce at least 153 packages per 8-hour day? (Round your answer to four decimal places.) You may need to use the appropriate appendix table or technology to answer this question. 10. [-/4 Points] DETAILS MENDSTAT14 7.E.078. MY NOTES ASK YOUR TEACHER The table lists the number of defective 60-watt lightbulbs found in samples of 100 bulbs selected over 25 days from a manufacturing process. Assume that during this time the manufacturing process was not producing an excessively large fraction of defectives.webassign.net C r my lonestar lonestar's mail Facebook Apple Bing Google Yahoo 1. [-/4 Points] DETAILS MENDSTAT14 8.E.007. MY NOTES ASK YOUR TEACHER Calculate the 95% margin of error in estimating a binomial proportion for each of the following values of n. Use p = 0.5 to calculate the standard error of the estimator. (Round your answers to three decimal places.) (a) n = 20 (b) n = 200 (c) n = 500 (d) n = 1,000 You may need to use the appropriate appendix table or technology to answer this question. 12. [-/4 Points] DETAILS MENDSTAT14 8.E.017. MY NOTES ASK YOUR TEACHER An increase in the rate of consumer savings is frequently tied to a lack of confidence in the economy and is said to be an indicator of a recessional tendency in the economy. A random sampling of n = 300 savings accounts in a local community showed a mean increase in savings account values of 7.8% over the past 12 months, with a standard deviation of 5.3%. Estimate the mean percent increase in savings account values over the past 12 months for depositors in the community. % Find the 95% margin of error (in %) for your estimate. (Round your answer to three decimal places.)C webassign.net water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo (c) n = 500 (d) n = 1,000 You may need to use the appropriate appendix table or technology to answer this question. 12. [-/4 Points] DETAILS MENDSTAT14 8.E.017. MY NOTES ASK YOUR TEACHER An increase in the rate of consumer savings is frequently tied to a lack of confidence in the economy and is said to be an indicator of a recessional tendency in the economy. A random sampling of n = 300 savings accounts in a local community showed a mean increase in savings account values of 7.8% over the past 12 months, with a standard deviation of 5.3%. Estimate the mean percent increase in savings account values over the past 12 months for depositors in the community. Find the 95% margin of error (in %) for your estimate. (Round your answer to three decimal places.) % You may need to use the appropriate appendix table or technology to answer this question. 13. [-/4 Points] DETAILS MENDSTAT14 8.E.021. MY NOTES ASK YOUR TEACHER Radio and television stations often air controversial issues during broadcast time and ask viewers to indicate their agreement or disagreement with a given stand on the issue. pay a fee for their calls. A poll is conducted by asking those viewers who agree to call a certain 900 telephone number and those who disagree to call a second 900 telephone number. All respondents (a) Does this polling technique result in a random sample?C webassign.net water my lonestar lonestar's mail Facebook Apple Bing Google Y Yahoo You may need to use the appropriate appendix table or technology to answer this question. 13. [-/4 Points] DETAILS MENDSTAT14 8.E.021. MY NOTES ASK YOUR TEACHER Radio and television stations often air controversial issues during broadcast time and ask viewers to indicate their agreement or disagreement with a given stand on the issue. A poll is conducted by asking those viewers who agree to call a certain 900 telephone number and those who disagree to call a second 900 telephone number. All respondents pay a fee for their calls. (a) Does this polling technique result in a random sample? Yes, this is a random sample No, this is not a random sample. (b) What can be said about the validity of the results of such a survey? The results of the survey would be valid because separate phone numbers were offered for those who agreed and disagreed. The results of all voluntary polls are valid. The results of the survey would be valid because the sample was random. The results of the survey would not be valid because the number of people who called in was not reported. The results of the survey would not be valid because the sample was not random. Do you need to worry about a margin of error in this case? yes O no 14. [-/6 Points] DETAILS MENDSTAT14 8.E.025. MY NOTES ASK YOUR TEACHERA webassign.net C + water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo 14. [-/6 Points] DETAILS MENDSTAT14 8.E.025. MY NOTES ASK YOUR TEACHER Find a 90% confidence interval for a population mean u for these values. (Round your answers to three decimal places.) (a) n = 115, x = 0.87, 52 = 0.086 (b) n = 80, x = 28.4, s'= 3.35 to (c) Interpret the intervals found in part (a) and part (b). In repeated sampling, 10% of all intervals constructed in this manner will enclose the population proportion. There is a 10% chance that an individual sample proportion will fall within the interval. In repeated sampling, 90% of all intervals constructed in this manner will enclose the population mean. 90% of all values will fall within the interval. There is a 90% chance that an individual sample proportion will fall within the interval. You may need to use the appropriate appendix table or technology to answer this question. 15. [-/4 Points] DETAILS MENDSTAT14 8.E.037. MY NOTES ASK YOUR TEACHER A sample survey is designed to estimate the proportion of sports utility vehicles being driven in the state of California. A random sample of 500 registrations are selected from a Department of Motor Vehicles database, and 51 are classified as sports utility vehicles. (2) lise a 950% confidence interval stimate the proportion of sports utility vehicles in California (Round your answers to theC webassign.net water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo You may need to use the appropriate appendix table or technology to answer this question. 16. [-/5 Points] DETAILS MENDSTAT14 8.E.081. MY NOTES ASK YOUR TEACHER Suppose you wish to estimate the difference between the mean acidity for rainfalls at two different locations, one in a relatively unpolluted area and the other in an area subject to heavy air pollution. If you wish your estimate to be correct to the nearest 0.2 pH, with probability near 0.90, approximately how many rainfalls (PH values) would have to be included in each sample? (Assume that the variance of the pH measurements is approximately 0.35 at both locations and that the samples will be of equal size. Round your answer up to the nearest whole number.) 71 = n2 = rainfalls You may need to use the appropriate appendix table or technology to answer this question. 17. [-/5 Points] DETAILS MENDSTAT14 8.E.091. MY NOTES ASK YOUR TEACHER Independent random samples were selected from binomial populations 1 and 2. Suppose you wish to estimate (P1 - P2) correct to within 0.06, with probability equal to 0.99, and you plan to use equal sample sizes-that is, n1 = n2. How large should n, and n2 be? (Assume maximum variation. Round your answer up to the nearest whole number.) 01 = 12 = You may need to use the appropriate appendix table or technology to answer this question. 18. [-/5 Points] DETAILS MENDSTAT14 8.E. 104. MY NOTES ASK YOUR TEACHER I webassign.net C water my lonestar lonestar's mail Facebook Apple Bing Google Yahoo n 1 = 12 = You may need to use the appropriate appendix table or technology to answer this question. 18. [-/5 Points] DETAILS MENDSTAT14 8.E. 104. MY NOTES ASK YOUR TEACHER A dean of men wishes to estimate the average cost of the freshman year at a particular college correct to within $280, with a probability of 0.95. If a random sample of freshmen is to be selected and each asked to keep financial data, how many must be included in the sample? Assume that the dean knows only that the range of expenditures will vary from approximately $14,900 to $23,060. (Round your answer up to the nearest whole number.) n = freshmen You may need to use the appropriate appendix table or technology to answer this question. 19. [-/5 Points] DETAILS MENDSTAT14 8.E. 111. MY NOTES ASK YOUR TEACHER In addition to teachers and administrative staff, schools also have many other employees, including bus drivers, custodians, and cafeteria workers. In Auburn, WA, the average hourly wage is $16.92 for bus drivers, $17.65 for custodians, and $12.86 for cafeteria workers. + Suppose that a second school district employs n = 49 bus drivers who earn an average of $14.85 per hour with a standard deviation of s = $2.82. Find a 95% confidence interval for the average hourly wage of bus drivers in school districts similar to this one. (Round your answers to two decimal places.) $ to $ Does your confidence interval enclose the Auburn, WA average of $16.92? Yes No What can you conclude about the hourly wages for bus drivers in this second school district? Auburn, WA pays bus drivers significantly less per hour than the second school district pays