Question
A bulb manufacturer claims that the lives of its bulbs are normally distributed with a mean of 6000 hours and a standard deviation of 400
A bulb manufacturer claims that the lives of its bulbs are normally distributed with a mean of 6000 hours and a standard deviation of 400 hours.
a. A random sample of 16 bulbs had an average life of 5850 hours. Is the manufacturer's claim correct?
b. How about a random sample of 16 bulbs having an average of 5800 hours? What is your conclusion?
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started
Calculus Early Transcendentals Early Transcendentals
Authors: Dennis G Zill, Warren S Wright
4th Edition
0763797375, 9780763797379
