#4 An educator estimates that the dropout rate for seniors at high schools in Colorado is 12%. Last year in a random sample of 300 Colorado seniors, 27 withdrew from school. At a = 0.05 level of...

Extracted text: #4 An educator estimates that the dropout rate for seniors at high schools in Colorado is 12%. Last year in a random sample of 300 Colorado seniors, 27 withdrew from school. At a = 0.05 level of significance, is there enough evidence to reject the educator's claim? а. What are the null and alternative hypotheses? b. What hypothesis test should be used? (t-test or z-test) c. What is the rejection region? d. What is your test statistic? Is this statistic the rejection region? е. What is the p-value of the test? f. What is your conclusion?


Extracted text: #3. A certain company would like to determine the amount of time employees waste at work each day. A random sample of 10 of its employees shows a mean time of 121.80 minutes wasted per day with a standard deviation of 9.45 minutes per day. Does the data provide evidence that the mean amount of time wasted by employees each day is more than 120 minutes? Test at a=.05 level of significance. Assume the population is at approximately normally distributed. What are the null and alternative hypotheses? а. b. What hypothesis test should be used? (t-test or z-test) c. What is the rejection region? d. What is your test statistic? Is this statistic in the rejection region? e. What is the p-value of the test? f. What is your conclusion?