SOLUTION: Determine the standardized test statistic, z, to test the claim about the population proportion ≠ 0.325 given n=42 and p (with caret above) =0.247. Use .α=0.05. Is

Algebra ->  Probability-and-statistics -> SOLUTION: Determine the standardized test statistic, z, to test the claim about the population proportion ≠ 0.325 given n=42 and p (with caret above) =0.247. Use .α=0.05. Is       Log On


   

Question 1077560: Determine the standardized test statistic, z, to test the claim about the population proportion ≠ 0.325
given n=42 and p (with caret above) =0.247. Use .α=0.05.
Is there answer:
A.
−2.575

B.
−1.32

C.
−1.54

D.
−1.08

The answer I came up with isn't even one of these so I'm stuck. Thanks!


Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(.247-0.325)/sqrt (.325*.675)/42; sqrt term is 0.0723
=-0.078/0.0723=-1.08
D.
One problem is that .247 can't be an integer proportion of 42. Neither 10/42 nor 11/42 is right.
Use the p0 in the radical term.