8.2.19 A 0.1 significance level is used for a hypothesis test of the claim that
ID: 3130927 • Letter: 8
Question
8.2.19
A
0.1
significance level is used for a hypothesis test of the claim that when parents use a particular method of gender selection, the proportion of baby girls is
greater
than 0.5. Assume that sample data consists of
66
girls in
121
births, so the sample statistic of
six elevenths
results in a z score that is 1 standard deviation
above
0. Complete parts (a) through (h) below.
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a. Identify the null hypothesis and the alternative hypothesis. Choose the correct answer below.
A.
Upper H 0
:
pequals
0.5
Upper H 1
:
pless than
0.5
B.
Upper H 0
:
pnot equals
0.5
Upper H 1
:
pgreater than
0.5
C.
Upper H 0
:
pequals
0.5
Upper H 1
:
pnot equals
0.5
D.
Upper H 0
:
pequals
0.5
Upper H 1
:
pgreater than
0.5
Explanation / Answer
As it is given that
when parents use a particular method of gender selection, the proportion of baby girls is
greater than 0.5 therefore the null hypothesis = H0=0.5
While the althernate hypothesis =Ha<0.5
hence option A is correct.
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