Can someone help solve this? Thank you!

You wish to test the following claim (H.) at a significance level of o = 0.01. d denotes the mean of the difference between pre-test and post-test scores. Ho: Pd = 0 Ha: Pa >0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n = 25 subjects. The average difference (post - pre) is d = 9.5 with a standard deviation of the differences of $a = 15.9. a. What is the test statistic for this sample? test statistic = Round to 3 decimal places. b. What is the p-value for this sample? Round to 4 decimal places. p-value = c. The p-value is... O less than (or equal to) or O greater than a d. This test statistic leads to a decision to... O reject the null O accept the null O fail to reject the null e. As such, the final conclusion is that... O There is sufficient evidence to warrant rejection of the claim that the mean difference of post-test from pre-test is greater than 0. There is not sufficient evidence to warrant rejection of the claim that the mean difference of post-test from pre-test is greater than 0. The sample data support the claim that the mean difference of post-test from pre-test is greater than 0. O There is not sufficient sample evidence to support the claim that the mean difference of post-test from pre-test is greater than 0