Marty, a typist, claims that his average typing speed is 72 words per minute. During a practice session, Marty has a sample typing speed mean of 84 words per minute based on 12 trials. At the 5% significance level, does the data provide sufficient evidence to conclude that his mean typing speed is greater than 72 words per minute? Accept or reject the hypothesis given the sample data below.H0:μ≤72 words per minute; Ha:μ>72 words per minuteα=0.05 (significance level)z0=2.1p=0.018Select the correct answer below:Select the correct answer below: 1.Do not reject the null hypothesis because 2.1>0.05. 2.Do not reject the null hypothesis because the value of z is positive. 3.Reject the null hypothesis because 2.75>0.05. 4.Reject the null hypothesis because the p-value 0.018 is less than the significance level α=0.05. 5.Do not reject the null hypothesis because the p-value 0.018 is less than the significance level α=0.05.

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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Marty, a typist, claims that his average typing speed is 72 words per minute. During a practice session, Marty has a sample typing speed mean of 84 words per minute based on 12 trials. At the 5% significance level, does the data provide sufficient evidence to conclude that his mean typing speed is greater than 72 words per minute? Accept or reject the hypothesis given the sample data below.

H0:μ≤72 words per minute; Ha:μ>72 words per minute
α=0.05 (significance level)
z0=2.1
p=0.018

Select the correct answer below:

1.Do not reject the null hypothesis because 2.1>0.05.

2.Do not reject the null hypothesis because the value of z is positive.

3.Reject the null hypothesis because 2.75>0.05.

4.Reject the null hypothesis because the p-value 0.018 is less than the significance level α=0.05.

5.Do not reject the null hypothesis because the p-value 0.018 is less than the significance level α=0.05.

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