Hi, can you help me solve this? Researches have claimed that the average number of headaches per student during a semester of Statictics is less than or equal to 18. Statictics students believe the average is higher. .In a sample of n=22 students the mean Is 23 headaches with a deviation of 2.1. Which of the following represent the null and alternative hypotheses necessary if we test the students' belief? Also, state the final conclusion if we decide that we will reject the null hypothesis.

Answers:

a. Ho : u = 18 vs. Ha : u=/18 ; The data does not support the student's claim

b. Ho : u < 18 vs. Ha : u=18 ; The data does not support the student's claim

c. Ho : u <= 18 vs. Ha : u>18 ; The data does not support the student's claim

d. Ho : u >= 18 vs. Ha : u<18 ; The data supports the student's claim

e. Ho : u <= 18 vs. Ha : u>18 ; The data rejects the student's claim

f. none of the above