Take Test: Test 3 - No Collaboration Allo OO Question Completion Status: QUESTION 31 elaware Ave, e, NY 14217 In a survey of 1389 adults from India, 668 say they are confident that the food they eat in their country is safe. com Construct a 90% confidence interval for the population proportion of adults who feel that the food they eat is safe. (Hint: Use of the Confidence Intervals (XLS) Template is recommended.) O A. (0.459, 0.505) O B. (0.495, 0.517) O C. (0.464, 0.498) O D. (0.474, 0.508) QUESTION 32 A scatter plot for a set of bivariate data is shown below. What would be a reasonable estimate for the correlation coefficient? A. -0.9 OB. -0.6 O C. 0.6 O D. 0.9Le. QUESTION 41 In a recent ABC News/Washington Post poll, 1,016 adults nationwide answered the question, "Overall, do you support or oppose allowing gays and lesbians to marry legally?" Of the respondents, 619 support same-sex marriage. What is the 95% confidence interval for the proportion of all American adults who support same-sex marriage? Optional: ConfidenceIntervals.xIsx http://www.washingtonpost.com/page/2010-2019/WashingtonPost/2015/04/23/National-Politics/Polling/release_395.x A. (0.570, 0.648) OB. (0.584, 0.634) OC. (0.579, 0.639) O D. (0.594, 0.624) QUESTION 42 In a study of migrating Sandhill Cranes, the distance traveled in a day were normally distributed, with a mean of 267 kilometers and a standard deviation of 86 kilometers. Find the probability that the distance traveled in a day by a randomly selected Sandhill Crane from the study is greater than 500 kilometers. (Use appropriate technology here or the Standard Normal Distribution Table to find your answer) A. 0.2709 B. 0.2710 O C. 0.0034 O D. 0.9966blackboard.ecc.edu C Content Take Test: Test 3 - No Collaborati Question Completion Status: QUESTION 45 The median list price of homes for sale in Erie County in May 2017 was $164,000 and the median list price of homes for sale in May 2018 was $169,000. Therefore, the percent of increase in the median list price was 3%, approximately. Please select the true statement below. O A. For any home that was for sale in Erie County from May 2017 to May 2018, the percent of increase in the list price of that home was 3%, approximately. O B. The median list price of homes that were for sale in Erie County from May 2017 to May 2018 was increased by 3%, approximately, but we can't conclude the same increase about any particular home that was for sale in Erie County in the period from May 2017 to May 2018.Take Test: Test 3 - No Collaboration Allowed OO * Question Completion Status: Delaware Ave, ore, NY 14217 .com QUESTION 39 2.0 Child Health and Development Studies (CHDS) has been collecting data about expectant mothers in Oakland, CA since 1959. One of the measurements taken by CHDS is the weight increase (in pounds) for expectant mothers in the second trimester. In a fictitious study, suppose that CHDS finds the average weight increase in the second trimester is 14 pounds. Suppose also that, in 2015, a random sample of 40 expectant mothers have mean weight increase of 16 pounds in the second trimester, with a standard deviation of 6 pounds. At the 5% significance level, we can conduct a one-sided 0.021. T-test to see if the mean weight increase in 2015 is greater than 14 pounds. Statistical software tells us that the p-value = Which of the following is the most appropriate conclusion? A. Since the p-value is greater than the significance level, we have sufficient evidence to reject the null hypothesis that the true mean weight is still 14 lbs. B. Since the p-value is less than the significance level, we have sufficient evidence to reject the null hypothesis that the true mean weight is still 14 lbs. O C. Since the p-value is less than the significance level, we do not have sufficient evidence and, therefore, fail to reject the null hypothesis that the true mean weight is still 14 lbs. O D. Since the p-value is greater than the significance level, we do not have sufficient evidence and, therefore, fail to reject the null hypothesis that the true mean weight is still 14 lbs. QUESTION 40 2.041 points Confidence interval precision: We know that narrower confidence intervals give us a more precise estimate of the true population proportion. Which of the following could we do to produce higher precision in our estimates of the population proportion? A. We can select a lower confidence level and decrease the sample size. O B. We can select a higher confidence level and increase the sample size. C. We can select a higher confidence level and decrease the sample size. O D. We can select a lower confidence level and increase the sample size. Save All Answers Close Window Save ar Click Save and Submit to save and submit. Click Save All Answers to save all answers.this national test. IS. Rose is an exceptional teacher who was able to prepare her students well for QUESTION 29 In the country of United States, the height measurements of ten-year-old children are approximately normally distributed with a mean of 53.6 inches, and standard deviation of 2.1 inches. What is the probability that a randomly chosen child has a height of less than 50.45 inches? (Hint: Using technology such as the Normal Curve Calculator is recommended.) A. 0.567 O B. 0.894 O C. 0.933 O D. 0.067 QUESTION 30 You want to estimate the average number of songs college students store on their portable devices. You want the margin of error to be no more than plus or minus 20 songs. You want a 95% confidence interval. How many students should you sample? Assume the standard deviation is 148 songs. (Hint: Use of the Confidence Intervals (XLS) Template is recommended.) O A. 15 students O B. 20 students O c. 211 students O D. 150 studentsQUESTION 43 The table shows the number (in thousands) of earned degrees by level and gender conferred in the US in a recent year: Male Female Total Associate's 361 581 942 Bachelor's 734 982 1716 Master's 292 439 731 Doctoral 80 84 164 Total 1467 2086 3553 A person who earned a degree in a year is randomly selected. Find the probability of selecting someone who earned an associate's degree, given that the person is male, P(Associate's Degree | Male). A. 361/1467 O B. 361/3553 O C. 942/1467 OD. 1467/3553 QUESTION 44 A random sample of 15 statistics textbooks has a mean price of $100 with a standard deviation of $31.75. Determine whether a normal distribution or a t- distribution should be used or whether neither of these can be used to construct a confidence interval. Assume the distribution of statistics textbook prices is not normally distributed. A. Use normal distribution. B. Cannot use normal distribution or t-distribution. O c. Use the t-distribution.lon Status: QUESTION 48 A sample of 90 daily high temperatures during Spring in Anchorage, Alaska had X - 56.3 and s=8.9. Select the number line below that shows the 98% confidence interval for the mean Spring high temperature in Anchorage, Alaska based on this sample. Hint: Use of the Confidence Intervals (XLS) Template is recommended.) OA. . 54.5 x = 56.3 58.1 52 53 54 55 56 57 58 59 60 OB. . 54.1 x= 56.3 58.5 52 53 54 55 56 57 58 59 60 OC. . 54.8 x=56.3 57.8 52 53 54 55 56 57 58 59 60 OD. 53.8 x =56.3 58.8 52 53 54 55 56 57 58 59 60O blackboard.ecc.edu C Content Take Test: Test 3 - No Collaboration Question Completion Status: QUESTION 37 The line of best fit through a set of data is: y = 56.428 + 2.497x According to this equation, what is the predicted value (to the nearest tenth) of the dependent variable, y, when the independent variable, x, has a value 180? O A. 500.6 O B. 505.9 O C. 49.5 O D. 50.5oo Take Test: Test 3 - No Collaboration A Question Completion Status: 4 Delaware Ave, more, NY 14217 gle.com QUESTION 35 In a survey, 25 people were asked how much they spent on their child's last birthday gift. The results were roughly bell- shaped with a mean of $41 and a standard deviation of $5. Find the margin of error, E, at a 90% confidence level. (Hint: Use of the Confidence Intervals (XLS) Template is recommended.) O A. 1.711 O B. 1.645 O C. 1.28 D. 0.9 QUESTION 36 2. A used car dealer says that the mean price of a 2008 Honda CR-V is $20,500. You suspect this claim is incorrect and find a random sample of 14 similar vehicles with a mean price of $19,850 and a standard deviation of $1084. At a 5% level of significance, is there enough evidence to reject the dealer's claim? (Hint: Use of the Hypothesis Test (XLS) Template is recommended.) O A. Since P> 0.05, we fail to reject the null and therefore we can't support the claim that the mean price of a 2008 Honda CR-V is $20,500. B. Since P > 0.05, we fail to reject the null and therefore we can support the claim that the mean price of a 2008 Honda CR-V is $20,500. O c. Since P