Answered: Use a hypothesis test to test the given…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Use a hypothesis test to test the given claim.
A test of sobriety involves measuring the subject's motor skills. Twenty randomly selected sober subjects take the test and produce a mean score of 41.0 with a standard deviation of 3.4. At a significance level of 0.01, test the claim that the true mean score for all sober subjects is equal to 39.0.

Choose the best asnwer below:

A. Reject the null hypothesis of μ = 39.0 with a P-value of 0.00823. B. There is strong evidence that the true mean score for sober subjects is not 39.0.

C. Fail to reject the null hypothesis of μ = 39.0 with a P-value of 0.01647. There is not sufficient evidence that the true mean score for sober subjects is different from 39.0.

D. Reject the null hypothesis of μ = 39.0 with a P-value of 0.01647. There is sufficient evidence that the true mean score for sober subjects is different from 39.0.

E. There is not enough information to perform the test.

F. Fail to reject the null hypothesis of μ = 39.0 with a P-value of 0.02647. There is not sufficient evidence that the true mean score for sober subjects is different from 39.0.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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