Part D please to question 1

13 Imagine there is a national test on knowledge of American history . The nationwide mean, based on testing many people , is Go. You teach history and think your students can do better. you take a random Sample of 29 of your students and give them the test at the end of the semester . You believe that these students will score higher than the national average. a ) What is the nendirectional null hypothesis in symbols ? Here is the start - Ho: M your History students answer : Ho: M = 60 b . ) what is the nondirectional alternative , hypothesis in symbols ? Here is the start - H1: M your History students answer : H1: MI 60 C . ) with a two-tailed test with an alpha level of . OS , and a sample of 1= 29 , what are the degrees of freedom and the critical value of + ? - Degrees of freedom = 28 (0. 05 28) - Critical values of + = 2.08 d . ) when you test the sample of 29 students , you find that the mean score is 68.8 and the Standard deviation is 18.12 , calculate the value of t