Answer to Question #334089 in Statistics and Probability for erika

Question

Directions: Read the problems below and do what is asked. Write your answers on a separate sheet of paper.

1. The records of SCA Registrar show that the average final grade in Mathematics for STEM students is 91 with a standard deviation of 3. A group of student-researchers found out that the average final grade of 37 randomly selected STEM students in Mathematics is no longer 91. Use 0.05 level of significance to test the hypothesis and a sample mean within the range of 88 to 94 only.

   

A. State the hypotheses. 

B. Determine the test statistic to use. 

C. Determine the level of significance, critical value, and the decision rule. 

D. Compute the value of the test statistic. 

E. Make a decision. 

F. Draw a conclusion.