Question
I'm trying to understand how to break down this problem to better understand the steps of solving it. I don't know where to begin A
I'm trying to understand how to break down this problem to better understand the steps of solving it. I don't know where to begin
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 750 hours. A random sample of 25 light bulbs has a mean life of 745 hours. Assume the population is normally distributed and the population standard deviation is 60 hours. At = 0.02, do you have enough evidence to reject the manufacturer's claim?
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Elementary Statistics Picturing The World
Authors: Ron Larson, Betsy Farber
6th Edition
0321911210, 978-0321911216
