Insurance companies routinely conduct crash tests on vehicles to determine the cost of repairs. In four crashes at 5 miles per hour, the institute found the cost of Question list K repairs to be $255, $537, $518, and $428. Treat these data as a simple random sample of four crashes and compute a point estimate for the population mean cost of repair. O Question 1 A point estimate for the population mean cost of repair is $. O Question 2 (Type an integer or decimal rounded to two decimal places as needed.) O Question 3 O Question 4 Question 5Suppose a polling agency reported that46.9% of registered voters were in favor of raising income taxes to pay down the national debt. The agency states that , Question \"St I6 results are based on telephone interviews with a random sample of 1011 registered voters. Suppose the agency states the margin of error for 95% condence is 3.1%. Determine and interpret the condence inteNa for the proportion of registered voters who are in favor of raising income taxes to pay down the national debt. E O Question5 V that the proportion of V in favor of raising income taxes to pay down the national debt is between 0 Question 6 and . (Type integers or decimals rounded to three decimal | O Quesuon 7 adult Americans aged 18 or older 0 Question 8 registered voters 0 Question 9 :1 O Question10 0 Question 11 Question list K Construct a 95% confidence interval of the population proportion using the given information. x = 180, n = 300 O Question 6 Click here to view the table of critical values. C. . O Question 7 The lower bound is The upper bound is. O Question 8 (Round to three decimal places as needed.) O Question 9 -X Table of critical values O Question 10 Level of Confidence, Area in Each Tail, NIR Critical Value, z; (1 - a) . 100% 90% 0.05 1.645 O Question 11 95% 0.025 1.96 99% 0.005 2.575 O Question 12 Print Done O Question 13 Question 14A trade magazine routinely checks the drive-through service times of fast-food restaurants. A 95% confidence interval that results from examining 520 customers in Question list K one fast-food chain's drive-through has a lower bound of 177.6 seconds and an upper bound of 180.8 seconds. What does this mean? . . O Question 7 Choose the correct answer below. Question 8 O A. The mean drive-through service time of this fast-food chain is seconds % of the time. O B. There is a % probability that the mean drive-through service time of this fast-food chain is between seconds and seconds. O Question 9 O C. One can be % confident that the mean drive-through service time of this fast-food chain is between seconds and seconds. O D. One can be % confident that the mean drive-through service time of this fast-food chain is seconds. O Question 10 O Question 11 Question 12