A student believes that no more than 20% (i.e., ? 20%) of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample received A's
a. State the null and alternative hypotheses.
b. Using the critical value approach, test the hypotheses at the 1% level of significance.
c. Using the p-value approach, test the hypotheses at the 1% level of significance.
a. H0: P ? 0.2
Ha: P > 0.2
b. Do not reject H0; test statistic Z = 1 < 2.33
c. Do not reject H0; p-value = 0.1587 > 0.01
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