A sample of 39 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE). The participants take a mock GRE test before the program begins and again at the end to measure their improvement. The mean number of points improved was $\bar { x }$ =7. Assume the standard deviation is $\sigma$ =56 and let $\mu$ be، the population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses $H _ { 0 } : \mu = 0 \text { versus } H _ { 1 } : \mu > 0$
i). Compute the value of the test statistic.
ii). Compute the P-value.
iii). Do you reject H₀ at the $\alpha$ level?

Question

A sample of 39 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE). The participants take a mock GRE test before the program begins and again at the end to measure their improvement. The mean number of points improved was

\bar { x }

=7. Assume the standard deviation is

\sigma

=56 and let

\mu

be، the population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses

H _ { 0 } : \mu = 0 \text { versus } H _ { 1 } : \mu > 0

i). Compute the value of the test statistic.
ii). Compute the P-value.
iii). Do you reject H₀ at the

\alpha

level?

Quizplus · Accepted Answer

The Answer of A sample of 39 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE). The participants take a mock GRE test before the program begins and again at the end to measure their improvement. The mean number of points improved was $\bar { x }$=7. Assume the standard deviation is $\sigma$=56 and let $\mu$be، the population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses $H _ { 0 } : \mu = 0 \text { versus } H _ { 1 } : \mu > 0$ i). Compute the value of the test statistic. ii). Compute the P-value. iii). Do you reject H₀ at the $\alpha$ level?

A Sample of 39 Students Enroll in a Program That xˉ\bar { x }xˉ

A Sample of 39 Students Enroll in a Program That $\bar { x }$