The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Population standard deviation(millivolts) A 123 4 B 120 3 What type of hypothesis test should be performed?_______ select (left-tailed z-test, Paired t-test, Two-tailed z-test, unpaired t-test) What is the test statistic?_______ (Ex: 0.123)
The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Population standard deviation(millivolts) A 123 4 B 120 3 What type of hypothesis test should be performed?_______ select (left-tailed z-test, Paired t-test, Two-tailed z-test, unpaired t-test) What is the test statistic?_______ (Ex: 0.123)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 7PPS
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The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table.
Manufacturer | Sample mean voltage (millivolts) | Population standard deviation(millivolts) |
---|---|---|
A | 123 | 4 |
B | 120 | 3 |
What type of hypothesis test should be performed?_______ select (left-tailed z-test, Paired t-test, Two-tailed z-test, unpaired t-test)
What is the test statistic?_______ (Ex: 0.123)
What is the number of degrees of freedom?______ (Ex: 25)
Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α=0.05 significance level?_____ select ( no or yes)
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