Question

22. Which of the following statements is NOT true about hypothesis tests? A. The first assumption is that the null hypothesis (H0) is true. B. Critical values are arbitrary, but are directly related to the ? level. C. The p-value is the probability (under the null hypothesis) of observing a test statistic as extreme or more extreme than the one related to the data. D. When the p-value is less than ?, we would not have enough evidence to reject the null hypothesis (H0). E. When the test statistic is more extreme than the critical value(s), we would have enough evidence to reject the null hypothesis (H0) in favor of the alternative hypothesis (H1). 23. In a two-sample hypothesis test for the difference in means of independent samples, the test statistic was calculated to be t = -2.11. The critical values for the test were t* = ±2.05. Which of the following is the appropriate decision? A. Reject H0 B. Fail to reject H0 C. Reject H1 D. Fail to reject H1 E. Depends on the p-value and ? level 24. Use the table of summary statistics to determine the value of the test statistic in a hypothesis test for the difference in means of independent samples. The order of subtraction should be sample 1 minus sample 2. x? s n Sample 1 42 4 28 Sample 2 46 7 35 A. z = 0.59 B. z = 1.97 C. t = -6.83 D. t = -2.85 E. t = 1.40

          22. Which of the following statements is NOT true about hypothesis tests?

A. The first assumption is that the null hypothesis (H0) is true.

B. Critical values are arbitrary, but are directly related to the ? level.

C. The p-value is the probability (under the null hypothesis) of observing a test statistic as
extreme or more extreme than the one related to the data.

D. When the p-value is less than ?, we would not have enough evidence to reject the null
hypothesis (H0).

E. When the test statistic is more extreme than the critical value(s), we would have enough
evidence to reject the null hypothesis (H0) in favor of the alternative hypothesis (H1).

23. In a two-sample hypothesis test for the difference in means of independent samples, the test
statistic was calculated to be t = -2.11. The critical values for the test were t* = ±2.05. Which of
the following is the appropriate decision?

A. Reject H0
B. Fail to reject H0
C. Reject H1
D. Fail to reject H1
E. Depends on the p-value and ? level

24. Use the table of summary statistics to determine the value of the test statistic in a hypothesis test
for the difference in means of independent samples. The order of subtraction should be sample 1
minus sample 2.

        x?     s    n
Sample 1  42    4   28
Sample 2  46    7   35

A. z = 0.59
B. z = 1.97
C. t = -6.83
D. t = -2.85
E. t = 1.40

22. Which of the following statements is NOT true about hypothesis tests?

A. The first assumption is that the null hypothesis (H0) is true.

B. Critical values are arbitrary, but are directly related to the ? level.

C. The p-value is the probability (under the null hypothesis) of observing a test statistic as
extreme or more extreme than the one related to the data.

D. When the p-value is less than ?, we would not have enough evidence to reject the null
hypothesis (H0).

E. When the test statistic is more extreme than the critical value(s), we would have enough
evidence to reject the null hypothesis (H0) in favor of the alternative hypothesis (H1).

23. In a two-sample hypothesis test for the difference in means of independent samples, the test
statistic was calculated to be t = -2.11. The critical values for the test were t* = ±2.05. Which of
the following is the appropriate decision?

A. Reject H0
B. Fail to reject H0
C. Reject H1
D. Fail to reject H1
E. Depends on the p-value and ? level

24. Use the table of summary statistics to determine the value of the test statistic in a hypothesis test
for the difference in means of independent samples. The order of subtraction should be sample 1
minus sample 2.

x? s n
Sample 1 42 4 28
Sample 2 46 7 35

A. z = 0.59
B. z = 1.97
C. t = -6.83
D. t = -2.85
E. t = 1.40

Added by Soledad W.

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