Write the claim mathematically and identify H0 and Ha (b)Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic. (d) Decide whether to reject or fail to reject the null hypothesis.
A medical researcher says that at least 29% of adults are smokers. In a random samples of 160 adults, 22.5% say they are smokers. At a=0.04, do you have enough evidence to reject the resercher's claim.