The average breaking strength of a certain brand of steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sample of 20 cables is selected and tested. Find the sample mean that will cutoff the upper 95% of all samples of size 20 taken from the population. Assume the variable is normally distributed. 1 , , Answer = R . pounds. (Round answerto one decimal place) D Question 6 You work for a consumer advocate agency and want to estimate the population mean cost of replacing a car's transmission. As part of your study, you randomly select 50 replacement costs and nd the mean to be $2650.00. From the census bureau, you found out that the population standard deviation is $425.00. ; l 1. Find the best point estimate of the population mean $ ; (Round answer to two decimal places) 2. Find the margin of error for the 90% condence level. $l (Round answer to two decimal places) 3. Find the 90% condence interval for the population mean. ((Round answer to two decimal W $i l