Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 60 hours? (b) What proportion of light bulbs will last 51 hours or less? (c) What proportion of light bulbs will last between 57 and 62 hours? (d) What is the probability that a randomly selected light bulb lasts less than 46 hours? (a) The proportion of light bulbs that last more than 60 hours is (Round to four decimal places as needed.) (b) The proportion of light bulbs that last 51 hours or less is (Round to four decimal places as needed.) (c) The proportion of light bulbs that lasts between 57 and 62 hours is (Round to four decimal places as needed.) (d) The probability that a randomly selected light bulbs lasts less than 46 hours is (Round to four decimal places as needed.)

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 60 hours? (b) What proportion of light bulbs will last 51 hours or less? (c) What proportion of light bulbs will last between 57 and 62 hours? (d) What is the probability that a randomly selected light bulb lasts less than 46 hours? (a) The proportion of light bulbs that last more than 60 hours is (Round to four decimal places as needed.) (b) The proportion of light bulbs that last 51 hours or less is (Round to four decimal places as needed.) (c) The proportion of light bulbs that lasts between 57 and 62 hours is (Round to four decimal places as needed.) (d) The probability that a randomly selected light bulbs lasts less than 46 hours is (Round to four decimal places as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. With this information, answer the following questions.
(a) What proportion of light bulbs will last more than 60 hours?
(b) What proportion of light bulbs will last 51 hours or less?
(c) What proportion of light bulbs will last between 57 and 62 hours?
(d) What is the probability that a randomly selected light bulb lasts less than 46 hours?
(a) The proportion of light bulbs that last more than 60 hours is
(Round to four decimal places as needed.)
(b) The proportion of light bulbs that last 51 hours or less is
(Round to four decimal places as needed.)
(c) The proportion of light bulbs that lasts between 57 and 62 hours is
(Round to four decimal places as needed.)
(d) The probability that a randomly selected light bulbs lasts less than 46 hours is
(Round to four decimal places as needed.)

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