Unit 9 Exercise
1. Consider this hypothesis test:
H
0
: p
1
- p
2
= 0
H
a
: p
1
- p
2
< 0
Here p
1
is
the
population
mean of
Population
By:
Maryam Mohammad Amin
Due Date:
March 12, 2018
Course Code:
BUSI 1033 (
Statistics for Business)
Professor:
Dr. Albert Wong

random sample of each of the two populations to complete the following: (12 points)Population 1Population 2Sample Size ( n)200250Sample proportion (pbar)0.650.701.a.What is the pooled estimate of p?
b.Compute the test statistic z.
c.What is the rejection rule using the critical value approach and α = 0.05?
d.Based on the rejection rule from c., what is your conclusion on the hypothesis?
e.What is the p-value?
f.Use the above data to construct a 95% confidence interval for p1- p
2