a) np = 90*0.37=33.3 ≈ 33 (answer)
b)
Standard Error , SE = √( p(1-p)/n ) =
√(0.49*0.51/90) = 0.0527
Z Test Statistic = ( p̂-p)/SE = ( 0.3700
- 0.49 ) / 0.0527
= -2.28
p-Value =
0.0114 [excel function
=NORMSDIST(z)]
c)
smallest level of significance = 0.0114
please revert...
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