The new Twinkle bulb has a standard deviation σ =34 hours. A random sample of 77 light bulbs i
Question: The new Twinkle bulb has a standard deviation \[\sigma =34\] hours. A random sample of 77 light bulbs is selected from inventory. The sample mean was found to be \[\overline{X}=\] 492 hours.
a. Find the margin of error E for a 90% confidence interval. (5 points)
Round your answer to the nearest hundredths
b. Construct a 90% confidence interval for the mean life, m of all Twinkle
bulbs.
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Solution: The solution consists of 1 page
Type of Deliverable: Word Document
Type of Deliverable: Word Document
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