Can you answer these: Part 1 of 16 - Question 1 of 23 1.0 Points The data presented in the table below resulted from an experiment in which seeds of 5 different types were planted and the number of seeds that germinated within 5 weeks after planting was recorded for each seed type. At the .01 level of significance, is the proportion of seeds that germinate dependent on the seed type? Seed Type Observed Frequencies Germinated Failed to Germinate 1 31 7 2 57 33 3 87 60 4 52 44 5 10 19 A.Yes, because the test value 16.86 is greater than the critical value of 13.28 B.Yes, because the test value 16.86 is less than the critical value of 14.86 C.No, because the test value 16.86 is greater than the critical value of 13.28 D.No, because the test value 13.28 is less than the critical value of 16.86 Reset Selection Question 2 of 23 1.0 Points The chi-square goodness-of-fit test can be used to test for: A.difference between population means B.difference between population variances C.normality D.significance of sample statistics Reset Selection Part 2 of 16 - Question 3 of 23 1.0 Points In a simple linear regression analysis, the following sum of squares are produced: f$sum{(y-ar{y})^{2}}f$ = 400 f$sum{(y-y')^{2}}f$ = 80 f$sum{(y'-ar{y})^{2}}f$ = 320 The proportion of the variation in Y that is explained by the variation in X is: A.20% B.25% C.80% D.50% Reset Selection Question 4 of 23 1.0 Points The standard error of the estimate, sest, is essentially the A.mean of the explanatory variable B.standard deviation of the explanatory variable C.mean of the residuals D.standard deviation of the residuals Reset Selection Question 5 of 23 1.0 Points In choosing the best-fitting line through a set of points in linear regression, we choose the one with the: A.smallest number of outliers B.smallest sum of squared residuals C.largest sum of squared residuals D.largest number of points on the line Reset Selection Part 3 of 16 - Question 6 of 23 1.0 Points Which of the following statements is true regarding the F distribution? A.It is a distribution of negative values B.It is always skewed to the left C.It typically appears in tests of equal proportions D.none of the above Reset Selection Question 7 of 23 1.0 Points A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the .10 level of significance, that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree? Pine trees Spruce trees Sample size 40 70 Mean trunk diameter (cm) 45 39 Sample variance 100 150 A.The data support the claim because the test value 2.78 is greater than 1.28. B.The data do not support the claim because the test value 1.29 is less than 1.64. C. The data support the claim because the test value 2.78 is greater than 1.64. D. The data do not support the claim because the test value 1.29 is greater than 1.28. Reset Selection Part 4 of 16 - Question 8 of 23 1.0 Points A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2, does this provide enough evidence to reject the claim that the lab technicians accuracy is within the target accuracy? At the a = .01 level of significance, what is your conclusion? A.Reject H0. At the \f$\alpha \f$ = .01 level of significance, there is enough evidence to support the claim that this technicians variance is larger than the target accuracy. B.Do not reject H0. At the \f$\alpha \f$ = .01 level of significance there is not sufficient evidence to suggest that this technicians true variance is greater than the target accuracy. C.Cannot determine D. Reject H0. At the \f$\alpha \f$ = .01 level of significance, there is not enough evidence to support the claim that this technicians true variance is larger than the target accuracy. Reset Selection Question 9 of 23 1.0 Points A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2, does this provide enough evidence to reject the claim that the lab technicians accuracy is within the target accuracy? State the null and alternative hypotheses. A.H0: s2 1.2, H1: s2 1.2 B.H0: s2 1.2, H1: s2 = 1.2 C.H0: s2 1.2, H1: s2 > 1.2 D.H0: s2 < 1.2, H1: s2 1.2 Reset Selection Question 10 of 23 1.0 Points Which of the following statements are true of the null and alternative hypotheses? A.It is possible for neither hypothesis to be true B.It is possible for both hypotheses to be true C.Both hypotheses must be true D.Exactly one hypothesis must be true Reset Selection Part 5 of 16 - Question 11 of 23 1.0 Points Compute f$P(t_{15}geq 2.0)f$ where t15 has a t-distribution with 15 degrees of freedom. A.0.7639 B.0.96803 C.0.03197 D.0.93606 Reset Selection Question 12 of 23 1.0 Points The t- distribution for developing a confidence interval for a mean has _____ degrees of freedom. A.n + 1 B.n - 1 C.n D.n - 2 Reset Selection Part 6 of 16 - Question 13 of 23 1.0 Points Given that Z is a standard normal random variable, P(-1.0 < Z < 1.5) is A.0.8413 B.0.7745 C.0.0919 D.0.9332 Reset Selection Part 7 of 16 - Question 14 of 23 1.0 Points The variance of a binomial distribution for which n = 100 and p = 0.20 is: A.80 B.20 C.16 D.100 Reset Selection Part 8 of 16 - Question 15 of 23 1.0 Points In a genetics experiment 5 flowers out of 8 were bicolor, and the rest were solid color. If 3 of the flowers are selected at random without replacement, what is the probability that all 3 are bicolor? A.0.625 B.0.375 C.0.2441 D.0.1786 Reset Selection Part 9 of 16 - Question 16 of 23 3.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. A sport preference poll yielded the following data for men and women. Use a 5% significance level and test to determine if sport preference and gender are independent. Sport Preferences of Men and Women Basketball Football Soccer Men 20 25 30 75 Women 18 12 15 45 38 37 45 120 What is the test value for this hypothesis test? Answer: Round your answer to two decimal places. What is the critical value for this hypothesis test? Answer: Round your answer to two decimal places. What is the conclusion for this hypothesis test? Choose one. 1. There is sufficient evidence to support the claim that one's sport preference is dependent on one's gender. 2. There is not sufficient evidence to support the claim that one's sport preference is dependent on one's gender. Answer: Enter only a 1 or 2 for your answer. Part 10 of 16 - Question 17 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. Data for a sample of 25 apartments in a particular neighborhood are provided in the worksheet Apartments in the Excel workbook Apartments.xlsx. Using the estimated regression equation found by using size as the predictor variable, find a point estimate for the average monthly rent for apartments having 1,000 square feet of space. Place your answer, rounded to the nearest whole dollar, in the blank. When entering your answer do not use any labels or symbols. Simply provide the numerical value. For example, 123 would be a legitimate entry. Apartments.xlsx Part 11 of 16 - Question 18 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. An investor wants to compare the risks associated with two different stocks. One way to measure the risk of a given stock is to measure the variation in the stocks daily price changes. In an effort to test the claim that the variance in the daily stock price changes for stock 1 is different from the variance in the daily stock price changes for stock 2, the investor obtains a random sample of 21 daily price changes for stock 1 and 21 daily price changes for stock 2. The summary statistics associated with these samples are: n1 = 21, s1 = .849, n2 = 21, s2 = .529. If you follow Bluman's advice and place the larger variance in the numerator, what is the test value associated with this test of hypothesis? Place your answer, rounded to 3 decimal places, in the blank. For example, 3.456 would be a legitimate entry. Part 12 of 16 - Question 19 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. A popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of $30 and a standard deviation of $9. What is the probability that a randomly selected customer will spend less than $15 at this store? Place your answer, rounded to 4 decimal places, in the blank. For example, 0.3456 would be a legitimate entry. Part 13 of 16 - Question 20 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. The percent defective for parts produced by a manufacturing process is targeted at 4%. The process is monitored daily by taking samples of sizes n = 160 units. Suppose that todays sample contains 14 defectives. Determine a 95% confidence interval for the proportion defective for the process today. Place your LOWER limit, rounded to 3 decimal places, in the first blank. For example, 0.123 would be a legitimate answer. Place your UPPER limit, rounded to 3 decimal places, in the second blank. For example, 0.345 would be a legitimate entry. Part 14 of 16 - Question 21 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. Find the expected value of the following probability distribution. X 1 2 3 4 5 P(X) 0.05 0.20 0.35 0.25 0.15 Round your answer to two decimal place as necessary. For example, 4.56 would be a legitimate entry. Expected value = Part 15 of 16 - Question 22 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. A survey determines that mint chocolate chip is the favorite ice cream flavor of 6% of consumers. An ice cream shop determines that of 190 customers, 15 customers stated their preference for mint chocolate chip. Find the P-value that would be used to determine if the percentage of customers who prefer mint chocolate chip ice has increased at a 5% level of significance. P-value: Round your answer to four decimal places as necessary. Part 16 of 16 - Question 23 of 23 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. If a set of six books is to be placed on a shelf, in how many ways can the six books be arranged? Place your answer in the blank. Do not use any decimal places or commas. For example, 45 would be a legitimate entry