W1 - 5 -7 Breaking Strength of Steel Cable 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 cut off the upper 87% of all samples of size 20 taken from the population. Assume the variable is normally distributed. Round intermediate B-value calculations to 2 decimal places and round the final answer to at least 2 decimal places. dil The sample mean that will cut off the upper 87% of all samples of size 20 pounds 5