Question

Please explain answer in manual written and EXCEL function.

A sample of 35 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 exam before the program begins and again at the end to measure their improvement.

The mean number of points improved, x(bar) = sample mean, was 10. Assume the population standard deviation = 46 and let μ = population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses H_o: μ = 0 and H₁: μ > 0. Compute the P-value.

1. 1.2861
2. .0496
3. .0992
4. .0249

Answer 1

P-value = 0.0992

Option (c) is correct.