the test statistic of z = 1.39 is obtained when testing the claim that p>0.8.
a. Identify the hypothesis test as being two tailed, left tailed, or right tailed.
b. Find the P-value.
c. Using a significance level alpha = 0.05, should we reject Ho or should we fail to reject Ho?
d. What is the correct conclusion for this test?
Solution :
Given that
a ) This is the riight tailed test .
The null and alternative hypothesis is
H0 : p = 0.8
Ha : p >0.8
Test statistic = z = 1.39
P(z > 1.39 ) = 1 - P(z < 1.39 ) = 1 - 0.9177
b ) P-value = 0.0823
c ) = 0.05
P-value >
0.0823 > 0.05
d ) Fail to reject the null hypothesis .
There is insufficient evidence to suggest that
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