Mathematics, 27.04.2020 02:23, CodyJ4503

A manufacturer receives an order for fluorescent light bulbs. The order requires that the bulbs have a mean life span of 950 hours. The manufacturer selects a random sample of 25 fluorescent light bulbs and finds that they have a mean life span of 945 hours with a standard deviation of 15 hours. Test to see if the manufacturer is making acceptable light bulbs. Use a 95% confidence level. Assume the data are normally distributed.

1. What is the margin of error for this interval? (round to the nearest hundredth)

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A manufacturer receives an order for fluorescent light bulbs. The order requires that the bulbs have...