Week 4 Homework : Question 9 of 20 [1 point) I Question Attempt'l of Unlimited _ E n I \"soacumaaacaa b Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, [.l. The managers plan to choose a random sample of completion times and estimate [.1 via the sample. Assuming that the standard deviation of the population of completion times is 10.3 minutes, what is the minimum sample size needed for the managers to be 95% condent that their estimate is within 1.5 minutes of p? 00 Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satises the requirements). '3 (If necessary, consult a list of formulas.) El '3 xo? E n