In a survey of 200   females who recently completed high​ school, 75 ​% were enrolled in college. In a survey of 140   males who recently completed high​ school, 70 ​% were enrolled in college. At alpha equals 0.06 ​, can you reject the claim that there is no difference in the proportion of college enrollees between the two​ groups? Assume the random samples are independent. Complete parts​ (a) through​ (e).

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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Author:HOLT MCDOUGAL
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Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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In a survey of

200
 

females who recently completed high​ school,

75
​%

were enrolled in college. In a survey of

140
 

males who recently completed high​ school,

70
​%

were enrolled in college. At

alpha equals 0.06
​,
can you reject the claim that there is no difference in the proportion of college enrollees between the two​ groups? Assume the random samples are independent. Complete parts​ (a) through​ (e).
​(a) Identify the claim and state
Upper H 0
 

and

Upper H Subscript a
.
 
The claim is​ "the proportion of female college enrollees is
 
greater than
less than
different than
the same as
the proportion of male college​ enrollees."
Let
p 1
 

represent the population proportion for female college enrollees and

p 2
 

represent the population proportion for male college enrollees. State

Upper H 0
 

and

Upper H Subscript a
.
 
Choose the correct answer below.
 
 
A.
Upper H 0
​:
p 1

equalsp 2

Upper H Subscript a
​:
p 1

not equalsp 2

 
 
B.
Upper H 0
​:
p 1

not equalsp 2

Upper H Subscript a
​:
p 1

equalsp 2

 
 
C.
Upper H 0
​:
p 1

greater than or equalsp 2

Upper H Subscript a
​:
p 1

less thanp 2

 
 
D.
Upper H 0
​:
p 1

less thanp 2

Upper H Subscript a
​:
p 1

greater than or equalsp 2

 
 
E.
Upper H 0
​:
p 1

less than or equalsp 2

Upper H Subscript a
​:
p 1

greater thanp 2

 
 
F.
Upper H 0
​:
p 1

greater thanp 2

Upper H Subscript a
​:
p 1

less than or equalsp 2

 
​(b) Find the critical​ value(s) and identify the rejection​ region(s).
 
The critical​ value(s) is(are)
nothing
.
​(Use a comma to separate answers as needed. Type an integer or a decimal. Round to two decimal places as​ needed.)
Identify the rejection​ region(s). Select the correct choice below and fill in the answer​ box(es) within your choice. ​(Round to two decimal places as​ needed.)
 
 
A.
zgreater than

nothing

 
 
B.
nothing

less thanzless thannothing

 
 
C.
zless than

nothing

 
 
D.
zless than

nothing

 

and

zgreater than

nothing

 
​(c) Find the standardized test statistic.
 
zequals

nothing

 
​(Round to two decimal places as​ needed.)
​(d) Decide whether to reject or fail to reject the null hypothesis.
 
Choose the correct answer below.
 
 
 
Fail to reject
 
Upper H 0
 

because the test statistic

is
 
in the rejection region.
 
 
Fail to reject
 
Upper H 0
 

because the test statistic

is not
 
in the rejection region.
 
 
Reject
 
Upper H 0
 

because the test statistic

is not
 
in the rejection region.
 
 
Reject
 
Upper H 0
 

because the test statistic

is
 
in the rejection region.
​(e) Interpret the decision in the context of the original claim.
 
Choose the correct answer below.
 
 
A.
At the
6
​%

significance​ level, there is

sufficient
 
evidence to reject the claim.
 
B.
At the
6
​%

significance​ level, there is

insufficient
 
evidence to support the claim.
 
C.
At the
6
​%

significance​ level, there is

sufficient
 
evidence to support the claim.
 
D.
At the
6
​%

significance​ level, there is

insufficient
 

evidence to reject the claim.

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