Lab 16 Hypothesis Tests | Score: 0/78 0/6 answered Progress saved Done & Voce . . . . Question 1 0/13 pts 9 3 2 3 0 Details In 2012, the General Social Survey sampled 169 employed people and asked them how satisfied they were with their jobs. Of the 169 people sampled, 115 said that they were satisfied with their jobs. Can you conclude that more than 65% of employed people in the United States are satisfied with their jobs? Use the a = 0.15 level. a. State the null and alternative hypotheses. Ho: ? Y ? Y H1: ? Y ? Y b. Find the critical value and sketch the rejection region. Sketch of Rejection Region: -3 -2 -1 0 3 Q 2 w Q O -3 -2 - -1 0 Q O Critical value(s): (If there are two critical values, list both values separated by a comma) c. Find the test statistic.Lab 15 Confidence Intervals || Score: 0!91 0(11 answered Progress saved _'Done: IE! 45' 0 Question 7 v E: 014 pts '0 3 3 3 6) Details A new5paper wants to predict the outcome of an election by estimating the proportion of voters who support the construction of a mall in Elk Grove. A previous survey done earlier in the year found that 72% of voters support the construction of the mall. What sample size is needed if the newspaper wants the estimate to be within 4% with 91 % condence? [:J d. Find the p-value. C] e. Decide: Ho f. Conclusion: At a = 0.15 significance level, there it enough evidence to conclude that more than 65% of employed people in the United States are satisfied with their jobs. Lab 15 Confidence Intervals II Score: 0/91 0/11 answered Progress saved Done G Voce . . . . Question 8 0/12 pts 93 3 0 Details A simple random sample of 60 colleges and universities in the United State had a mean tuition of $18,775 with a standard deviation of $9,064. a. Construct a 89% confidence interval for the mean tuition for all colleges and universities in the United States. Critical value: z, ort* = (Enter the positive one.) Margin of Error: E = Confidence Interval: [ b. Interpret your result in part (a) in a complete sentence. c. Based on the confidence interval, can you conclude that the mean tuition is less than $22,000? Yes ONo d. If you wanted a larger margin of error, would you increase or decrease the sample size? Increase Decrease e. If you wanted a larger margin of error, would you increase or decrease the confidence level? Increase Decrease