Question 9.412

27. Test whether the population proportion is less than 0.25. A random sample of size 100 yields 25 successes.

9.99.27

(a) We have and . (b) . Reject if the . (c) 0 (d) 0.5 (e) Since the is not , we do not reject . There is insufficient evidence that the population proportion is less than 0.25.