Question

In a Gallop poll of 1012 randomly selected adults, 9% said that cloning of humans should be allowed. We are going to use a .05 significance level to test the claim that less than 10% of all adults say that cloning of humans should be allowed. What are the appropriate null and alternative hypotheses? (NE means not equal).

Ho: p = .09 and Ha: p NE .10

Ho: p = .09 and Ha: p < .10

Ho: p = .10 and Ha: p < .10

Ho: p = .10 and Ha: p NE .10

Answer 1

Solution :

test the claim that less than 10%

This is the left  tailed test .

The null and alternative hypothesis is

H₀ : p =0.10

H_a : p < 0.10