Statistical Hypothesis Testing and Independent Samples Outcome
Business Statistics, 9e (Groebner/Shannon/Fry)
Chapter 10 Estimation and Hypothesis Testing for Two Population Parameters
1) The Cranston Hardware Company is interested in estimating the difference in the mean purchase for men customers versus women customers. It wishes to estimate this difference using a 95 percent confidence level. If the sample size is n = 10 from each population, the samples are independent, and sample standard deviations are used, and the variances are assumed equal, then the critical value will be t = 2.1009.
Answer: TRUE
Diff: 2
Keywords: confidence interval, mean difference, independent, sample
Section: 10-1 Estimation for Two Population Means Using Independent Samples
Outcome: 1
2) To find a confidence interval for the difference between the means of independent samples, when the variances are unknown but assumed equal, the sample sizes of the two groups must be the same.
Answer: FALSE
Diff: 2
Keywords: confidence interval, mean difference, independent
Section: 10-1 Estimation for Two Population Means Using Independent Samples
Outcome: 1
3) The Cranston Hardware Company is interested in estimating the difference in the mean purchase for men customers versus women customers. It wishes to estimate this difference using a 95 percent confidence level. Assume that the variances are equal and the populations normally distributed. The following data represent independent samples from each population:
Men
Women
16.49
17.21
33.34
17.46
20.18
15.65
26.39
10.67
28.03
14.07
26.02
19.61
16.08
15.90
32.27
11.17
21.66
24.66
32.32
13.35
29.79
20.87
33.37
22.57
Based on these data, the upper limit of the interval estimate is approximately $13.82.
Answer: TRUE
Diff: 3
Keywords: confidence interval, mean difference, independent
Section: 10-1 Estimation for Two Population Means Using Independent Samples
Outcome: 1
4) The Cranston Hardware Company is interested in estimating the difference
Chapter 10 Estimation and Hypothesis Testing for Two Population Parameters
1) The Cranston Hardware Company is interested in estimating the difference in the mean purchase for men customers versus women customers. It wishes to estimate this difference using a 95 percent confidence level. If the sample size is n = 10 from each population, the samples are independent, and sample standard deviations are used, and the variances are assumed equal, then the critical value will be t = 2.1009.
Answer: TRUE
Diff: 2
Keywords: confidence interval, mean difference, independent, sample
Section: 10-1 Estimation for Two Population Means Using Independent Samples
Outcome: 1
2) To find a confidence interval for the difference between the means of independent samples, when the variances are unknown but assumed equal, the sample sizes of the two groups must be the same.
Answer: FALSE
Diff: 2
Keywords: confidence interval, mean difference, independent
Section: 10-1 Estimation for Two Population Means Using Independent Samples
Outcome: 1
3) The Cranston Hardware Company is interested in estimating the difference in the mean purchase for men customers versus women customers. It wishes to estimate this difference using a 95 percent confidence level. Assume that the variances are equal and the populations normally distributed. The following data represent independent samples from each population:
Men
Women
16.49
17.21
33.34
17.46
20.18
15.65
26.39
10.67
28.03
14.07
26.02
19.61
16.08
15.90
32.27
11.17
21.66
24.66
32.32
13.35
29.79
20.87
33.37
22.57
Based on these data, the upper limit of the interval estimate is approximately $13.82.
Answer: TRUE
Diff: 3
Keywords: confidence interval, mean difference, independent
Section: 10-1 Estimation for Two Population Means Using Independent Samples
Outcome: 1
4) The Cranston Hardware Company is interested in estimating the difference