Two brands of batteries are tested, and their voltages are compared. The summary statistics follow. For sample 1, the sample size is 27; the population standard deviation is 0.3 volts and the mean is 9.2 volts. For sample 2, the sample size is 30; the population standard deviation is 0.1 volts and the mean is 8.8 volts. Is the mean of sample 1 smaller than the mean of sample 2? Using a significance level of 0.05. b) What is the teststatistics? Find the critical values (s) d) Graph your decision and include all thevalues. That is, the mean, the standard deviation, the critical value(s), therejection region. e) Set up the formula with the correct numbers for the 95%confidence interval of the mean number of jobs. when do you use df and when do you just use the confidence level given by the significance level?

Name: Two brands of batteries are tested, and their voltages are compared. T
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Description: Two brands of batteries are tested, and their voltages are compared. The summary statistics follow. For sample 1, the sample size is 27; the population standard deviation is 0.3 volts and the mean is 9.2 volts. For sample 2, the sample size is 30; t

Given : Mean: x1 = 9.2x2 = 8.8 Sample size n1 = 27 n2 = 30 Standard deviation s1 = 0.3 s2 = 0.1

Answered: Two brands of batteries are tested, and…

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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Two brands of batteries are tested, and their voltages are compared. The summary statistics follow. For sample 1, the sample size is 27; the population standard deviation is 0.3 volts and the mean is 9.2 volts. For sample 2, the sample size is 30; the population standard deviation is 0.1 volts and the mean is 8.8 volts. Is the mean of sample 1 smaller than the mean of sample 2? Using a significance level of 0.05.

b) What is the test

statistics? Find the critical values (s)

d) Graph your decision and include all the

values. That is, the mean, the standard deviation, the critical value(s), the

rejection region.

e) Set up the formula with the correct numbers for the 95%

confidence interval of the mean number of jobs.

when do you use df and when do you just use the confidence level given by the significance level?

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