The test statistics of z= 2.21 is obtained when testing the claim that p>0.3
a. Identify the hypothesis test as being two tailed, left tailed, or right tailed
b. Find p value
c.using a significant level of = 0.05, should we reject H0 or should we fail To reject H0?
Solution :
This is the right tailed test .
The null and alternative hypothesis is
H0 : p =0.3
Ha : p > 0.3
z=2.21
P(z >2.21 ) = 1 - P(z < 2.21) = 1-0.9864=0.0136
P-value = 0.0136
= 0.05
P-value <
Reject the null hypothesis .
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