• For #’s 1 – 4, Newfane High School claims that 81% of its graduates go to post-secondary school.  You do not believe that this claim is accurate.  You decide to perform a Hypothesis Test to challenge it.  Your sample of 81 graduates yields an average of 78% attending college and Sx = 6.35. 

    1) Write the null and alternative hypothesis:

     

    2) Determine the value of the critical region for α = .01 level of significance.

     

    3) Find the value of the z test score.

     

    4) Draw a picture of the curve and decide whether or not to reject the claim.
     
    For #’s 5 - 8, Newfane High School claims that 81% of its graduates go to post-secondary school.  You do not believe that this claim is accurate.  You decide to perform a Hypothesis Test to challenge it.  Your sample of 18 graduates yields an average of 75% attending college and Sx = 6.35. 

    1) Write the null and alternative hypothesis:

     

    2) Determine the value of the critical region for α = .01 level of significance.

     

    3) Find the value of the t test score.

     

    4) Draw a picture of the curve and decide whether or not to reject the claim.