The print on the package of 100-watt General Electric soft-white light-bulbs says that these bulbs have an average life

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The print on the package of 100-watt General Electric soft-white light-bulbs says that these bulbs have an average life

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The Print On The Package Of 100 Watt General Electric Soft White Light Bulbs Says That These Bulbs Have An Average Life 1
The Print On The Package Of 100 Watt General Electric Soft White Light Bulbs Says That These Bulbs Have An Average Life 1 (76.69 KiB) Viewed 26 times
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. greater than 745 hours. Round your answer to four decimal places. i b. between 735 and 740 hours. Round your answer to four decimal places. i c. within 15 hours of the population mean. Round your answer to four decimal places. i d. less than the population mean by at least 10 hours or more. Round your answer to four decimal places. i
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