Statistic exam
Solution of STAT 3704 HW 5
Question 1: 4.12 a and b (page 202) from the textbook
Solution:
Question 2: (a) What is the meaning of the P‐value? (b) What is the meaning of α‐level? (c) We tested the null hypothesis that the weight of a McDonald's quarter pounder is 0.25 pounds (H0 : µ = 0.25) against the alternative that the weight is below 0.25 pounds (Ha : µ < 0.25). After collecting a sample our observed z statistic was z = ‐2.02. Find the largest level at which the hypothesis testing procedure does not reject H0.
Solution:
(a) : P-value is the probability of the observed test statistic or one more extreme when H0 is true.
(b) α-level is probability of erroneously rejecting H0. (c)
Question 3:
Solution: Part a:
is 8.
Part b:
Part c:
Part d:
Question 4:
Solution:
Part a:
Part b:
Question 5:
Solution: Part a:
Part b:
Question 6:
Solution:
Part a:
Part b: