If the standard deviation of the lifetimes of vacuum cleaners is estimated to be 300 hours, how large of a sample must be taken in order to be 97% confident that the margin of error will not exceed 40 hours? Multiple choice use z or t chart if needed. Show all work. a) 245 b) 265 c) 260 d) 280

If the standard deviation of the lifetimes of vacuum cleaners is estimated to be 300 hours, how large of a sample must be taken in order to be 97% confident that the margin of error will not exceed 40 hours? Multiple choice use z or t chart if needed. Show all work. a) 245 b) 265 c) 260 d) 280

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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Question

Multiple choice use z or t chart if needed. Show all work.

a) 245

b) 265

c) 260

d) 280

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