Question

Test the hypothesis using the P-value approach. Ho: p 0.55 versus H1 p0.55 n-150, X-78, α-0.10 Perform the test using the P-value approach. P-value(Round to four decimal places as needed.)

Answer 1

Ans:

1)

sample proportion=78/150=0.52

Test statistic:

z=(0.52-0.55)/sqrt(0.55*(1-0.55)/150)

z=-0.739

P(z<-0.739)=0.2301*

*(if z is rounded off to -0.74,p-value will be=0.2296)

2)Option B is correct.

3)np₀(1-p₀)=868*0.022*(1-0.022)=18.7>10

population size not given,sample is not given random

4)np₀(1-p₀)=500*0.72*(1-0.72)=100.8

Yes,because 500*0.72*(1-0.72)=100.8