Question: Chapter 07, Supplementary Exercises, Problem 095 Please help me solve this question and thank you!!!!!!!!!! The print on the package of 100 -watt General Electric

Chapter 07, Supplementary Exercises, Problem 095

Please help me solve this question and thank you!!!!!!!!!!

The print on the package of 100 -watt General Electric soft-white light-bulbs says that these bulbs have an average life of 750 hours. Assume that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Find the probability that the mean life of a random sample of 25 such bulbs will be a. greaterthan 745 hours Round your answer to four decimal places. '1 b. between 725 and 740 hours Round your answer to four decimal places. :n c. within 10 hours of the population mean Round your answer to four decimal places. :'a d. less than the population mean by at least 10 hours or more Round your answer to four decimal places. t4

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