Test the hypothesis using the P-value approach.

Falak Kinney

Falak Kinney

Answered question

2021-05-27

Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test.
H0: P=0.52 versus H1:p<0.52
N=150,X=72,α=0.1
Is NP0(1P0) greater than or equal to 10?
Use technology to find the P-Value.

Answer & Explanation

pattererX

pattererX

Skilled2021-05-28Added 95 answers

Null hypothesis, H0:P=0.52
Alternative hypothesis, H1:P<0.52
Under H0, the population proportion is P0=0.52
Now consider,
NP0(1P0)=150×0.48×(10.48)
=37.44
>10
Since NP0(1P0)  is greater than or equals to 10, use normal approximation to test the true proportion.
Given information:
Number of trials, N=150
Number of sucesses in 150 cases, X=72
Sample proportion,
p=XN
=72150
=0.48
Compute test statistic.
z=pP0P0(1P0)N
=0.480.52(0.52)(10.52)N
=0.98058
=0.98
Alternative hypothesis has symbol "<", so the test is based on left-tailed.
Using Excel function "=NORMSTD(z)"
Pvalue=P(Zz)
=P(Z0.98)
=NORMSDIST(0.98)
=0.1635
When testing the hypothesis H0:P=0.52 versus H1:P<0.52, using the sample information N=150 and X=72, the P-value of test is 0.1635

Do you have a similar question?

Recalculate according to your conditions!

New Questions in College Statistics

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?