In this problem assume a normal population distribution studying for exams can lead college students to have severe anxiety some researchers believe that increased anxiety can lead to more varied sleep patterns and individuals let X represent the amount of hours a college student gets regularly suppose that students normally have the population variance of X being approximately 02 = 1 .75 during exam final week at one university a random sample of 22 students show that the ex has a sample variance of S2 = 2.17 use a 5% level of significance to test the claim that the variance of sleep hours is different than 1.75 during final exam week.

(a) What is the level of significance?
State the null and alternate hypotheses.