any state auto insurance company took a random sample of 388 insurance claims paid out during a one year period. The average claim paid was 1590....

any state auto insurance company took a random sample of 388 insurance claims paid out during a one year period. The average claim paid was &1590. Assume the standard deviation = $264.

Find a 0.90 confidence interval for the mean claim payment.

Find a 0.99 confidence interval for the mean claim payment.