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Question 21.21. For a sample...

Question 21.21. For a sample size of 172, the degrees of freedom are ________. (Points : 2) 172 171 13.11 173 Question 22.22. The α used to calculate a confidence interval can be understood as ________. (Points : 2) the probability that the population

mean will not fall in the confidence interval the difference between the population parameter and the sample statistic the confidence that the population mean is known the likelihood that the population mean was properly calculated Question 23.23. Peak Previously

Played Picks buys and sells used sports equipment. For the past year, the mean purchase of used sports equipment was $36 with a standard deviation of $8. Find the probability that the mean purchase from a sample of 16 customers will be less than $20. Use the

Microsoft Excel function NORM.DIST. (Points : 2) 0.00% 100.0% 2.28% 69.13% Question 24.24. A finite population correction factor should be used to adjust the margin of error when the sample taken is larger than ________ of the entire population. (Points :

2) 10% 1% 5% 50% Question 25.25. Which of the following is not an appropriate alternative hypothesis for the null hypothesis, H0: mean production cost = $2.00? (Points : 2) H1: mean production cost > $2.00 H1: mean production costs < $2.00 H1: mean production

costs = $2.00 H1: mean production costs ? $2.00 Question 26.26. When conducting two-sample tests for means with independent samples, ________. (Points : 2) it is always assumed that the population variances are equal the test for equality of variances is conducted,

and if the variances are not equal the t-test in Excel should not be used the test for equality of variances is conducted to determine if the variances are equal and thereby choose the appropriate t-test in Excel it is always assumed that the population variances

are unequal Question 27.27. Another term for p-value is ________. (Points : 2) degrees of freedom random effect probability density function observed significance level Question 28.28. Use the below information to answer the following five questions. A company

wishes to test whether the proportion of female managers is the same as the proportion of male managers. The following table provides data for a sample of employees. Females Males Number of managers 18 23 Sample size 45 75 Which of the following is the conclusion?

(Points : 2) We reject H0 that the proportion of female managers is the same as the proportion of male managers. We should not reject H0 that the proportion of female managers is not the same as the proportion of male managers. We reject H0 that the proportion

of female managers is not the same as the proportion of male managers. We should not reject H0 that the proportion of female managers is the same as the proportion of male managers. Question 29.29. The confidence coefficient is ________. (Points : 2) the probability

of correctly failing to reject the null hypothesis the probability of making a Type II error the probability of making a Type I error the probability of correctly rejecting the null hypothesis Question 30.30. If the confidence coefficient is 0.9, ________.

(Points : 2) we expect that 9 samples out of 100 will support the null hypothesis we expect that 90 out of 100 samples will support the null hypothesis we expect that 10 samples out of 100 will support the null hypothesis we expect that all 100 samples will

support the null hypothesis

mean will not fall in the confidence interval the difference between the population parameter and the sample statistic the confidence that the population mean is known the likelihood that the population mean was properly calculated Question 23.23. Peak Previously

Played Picks buys and sells used sports equipment. For the past year, the mean purchase of used sports equipment was $36 with a standard deviation of $8. Find the probability that the mean purchase from a sample of 16 customers will be less than $20. Use the

Microsoft Excel function NORM.DIST. (Points : 2) 0.00% 100.0% 2.28% 69.13% Question 24.24. A finite population correction factor should be used to adjust the margin of error when the sample taken is larger than ________ of the entire population. (Points :

2) 10% 1% 5% 50% Question 25.25. Which of the following is not an appropriate alternative hypothesis for the null hypothesis, H0: mean production cost = $2.00? (Points : 2) H1: mean production cost > $2.00 H1: mean production costs < $2.00 H1: mean production

costs = $2.00 H1: mean production costs ? $2.00 Question 26.26. When conducting two-sample tests for means with independent samples, ________. (Points : 2) it is always assumed that the population variances are equal the test for equality of variances is conducted,

and if the variances are not equal the t-test in Excel should not be used the test for equality of variances is conducted to determine if the variances are equal and thereby choose the appropriate t-test in Excel it is always assumed that the population variances

are unequal Question 27.27. Another term for p-value is ________. (Points : 2) degrees of freedom random effect probability density function observed significance level Question 28.28. Use the below information to answer the following five questions. A company

wishes to test whether the proportion of female managers is the same as the proportion of male managers. The following table provides data for a sample of employees. Females Males Number of managers 18 23 Sample size 45 75 Which of the following is the conclusion?

(Points : 2) We reject H0 that the proportion of female managers is the same as the proportion of male managers. We should not reject H0 that the proportion of female managers is not the same as the proportion of male managers. We reject H0 that the proportion

of female managers is not the same as the proportion of male managers. We should not reject H0 that the proportion of female managers is the same as the proportion of male managers. Question 29.29. The confidence coefficient is ________. (Points : 2) the probability

of correctly failing to reject the null hypothesis the probability of making a Type II error the probability of making a Type I error the probability of correctly rejecting the null hypothesis Question 30.30. If the confidence coefficient is 0.9, ________.

(Points : 2) we expect that 9 samples out of 100 will support the null hypothesis we expect that 90 out of 100 samples will support the null hypothesis we expect that 10 samples out of 100 will support the null hypothesis we expect that all 100 samples will

support the null hypothesis

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