1,905 2,725 2,677 2,600 2,962 2,184 2,332 3,112 2,545 2,525
(a) Estimate the mean (average) car insurance premium.
(b) Develop a 90% confidence interval for the mean in (a).
(c) Develop a 95% confidence interval for the mean in (a).
(d) Develop a 99% confidence interval for the mean in (a).
(e) The national average car premium was $1,503 in 2014. Compare this to your answers for (b)-(d). What can you say about car insurance in Michigan?