Solution :
This is the RIGHT tailed test .
The null and alternative hypothesis is
H0 : p =0.39
Ha : p > 0.39
= x / n = 216/475=0.455
P0 = 0.39
1 - P0 = 1-0.39=0.61
Test statistic = z
= - P0 / [P0 * (1 - P0 ) / n]
= 0.455-0.39/ [(0.39*0.61) / 475]
= 2.90
P(z > 2.90) = 1 - P(z <2.90 ) = 1-0.9981=0.0019
P-value =0.0019
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