1.Six batteries taken at random from a large lot were subjected to lifetests with the following results:19, 22, 18, 16, 25, and 20 hours.Find the probability that the sample mean of x= 20 hours, as observed here, or oneless than 20 hours could arise if the true mean of the lot of batteries is 21.5 hours,assuming a known variance of o = 10 hours, for the individual batteries in the lot.%3D

We have given that. X~N( μ = 21.5, ?^2 = 10) μ =21 , ? = 3.1623 Z-score =( x - μ )/?

Answered: Six batteries taken at random from a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A transect is an archaeological study area that is 1/5 mile wide and 1 mile long. A site in a transect is the location of a significant archaeological find. Let x represent the number of sites per transect. In a section of Chaco Canyon, a large number of transects showed that x has a population variance ?2 = 42.3. In a different section of Chaco Canyon, a random sample of 21 transects gave a sample variance s2 = 49.3 for the number of sites per transect. Use a 5% level of significance to test the claim that the variance in the new section is greater than 42.3................

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