MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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In a random sample of males, it was found that 20 write with their left hands and 213 do not. In a random sample of females, it was found that 74 write with their left hands and 440 do not. Use a 0.05 significance level to test the claim that the rate of left-handedness among males is less than that among females.
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Identify the test statistic.
(Round to two decimal places as needed.)
Identify the P-value.
(Round to three decimal places as needed.)
What is the conclusion based on the hypothesis test?
The P-value is (less than/greater than) the significance level of a=0.05, so (reject/fail to reject) the null hypothesis. There (is not sufficient/ is sufficient) evidence to support the claim that the rate of left-handedness among males is less than that among females.
Test the claim by constructing a 90% confidence interval.
(Round to three decimal places as needed.)
What is the conclusion based on the confidence interval?
Because the confidence interval limits (include/do not include) 0, it appears that the two rates of left-handedness are (not equal/equal)). There (is not sufficient/is sufficient) evidence to support the claim that the rate of left-handedness among males is less than that among females.
Based on the results, is the rate of left-handedness among males less than the rate of left-handedness amongfemales?
A. The rate of left-handedness among males does not
appear to be less than the rate of left-handedness among females because the results are statistically significant.
B. The rate of left-handedness among males does not
appear to be less than the rate of left-handedness among females because the results are not statistically significant.
C. The rate of left-handedness among males does appear to be less than the rate of left-handedness among females.
D. The results are inconclusive.
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