A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches.To test this claim against the alternative that the actual proportion of doctors who recommend aspirin is less than 0.90, a random sample of 100 doctors was selected.Suppose that the test statistic is - 2.20.Can you conclude that H0 should be rejected at the (a) $\alpha$ = 0.10, (b) $\alpha$ = 0.05, and (c) $\alpha$= 0.01 level of Type I error?
A)(a)yes; (b)yes; (c)yes
B)(a)no; (b)no; (c)no
C)(a)no; (b)no; (c)yes
D)(a)yes; (b)yes; (c)no

Question

Quizplus · Accepted Answer

The test statistic of -2.20 corresponds to p-values that would lead to rejection of the null hypothesis at the 0.05 and 0.10 levels (since critical values for these levels are typically around -1.645 and -1.282, respectively), but not at the 0.01 level (since the critical value is around -2.33).

A Survey Claims That 9 Out of 10 Doctors Recommend α\alphaα

A Survey Claims That 9 Out of 10 Doctors Recommend $\alpha$