A statistician wishing to test a hypothesis that students sc

A statistician wishing to test a hypothesis that students score at least 75% on the final exam in an into stats course decides to randomly select 20 students in the class and have them take the exam early. The average score of the students on the exam was 78%. The hypothesis the statistician wants to test is:

a. Ho: u=75 vs. Ha: u=78.

b. Ho: u=75 vs. Ha: u>78

c. Ho: u=75 vs. Ha: u<75

d. Ho: u=75 vs. Ha: u>75

Solution

Set Up Hypothesis
Null, students score equal to 75% H0:P=0.75
Alternate, students score at least 75% H1: P>0.75

d. Ho: u=75 vs. Ha: u>75