Suppose that Kitty studied for the Graduate Management Admission Test (GMAT) using a well-known preparation class and was thrilled to receive a total score of 770. Her friend Eric, however, thinks she would have scored just as well without the class. To test the efficacy of the class, they obtain a small but random sample of 19 test results from other students using the same class. This sample's average is 568.56 with a standard deviation of 116.72. In comparison, the national average was 550.12. Assume the population's results are normally distributed but that its standard deviation is not known. Kitty and Eric decide to perform a two-tailed t-test at a significance level of a = 0.05. How many degrees of freedom should they use in their calculations? df =

Suppose that Kitty studied for the Graduate Management Admission Test (GMAT) using a well-known preparation class and was thrilled to receive a total score of 770. Her friend Eric, however, thinks she would have scored just as well without the class. To test the efficacy of the class, they obtain a small but random sample of 19 test results from other students using the same class. This sample's average is 568.56 with a standard deviation of 116.72. In comparison, the national average was 550.12. Assume the population's results are normally distributed but that its standard deviation is not known. Kitty and Eric decide to perform a two-tailed t-test at a significance level of a = 0.05. How many degrees of freedom should they use in their calculations? df =

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Description: Suppose that Kitty studied for the Graduate Management Admission Test (GMAT) using a well-known preparation class andwas thrilled to receive a total score of 770. Her friend Eric, however, thinks she would have scored just as well withoutthe class.T

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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Topic Video

Question

Suppose that Kitty studied for the Graduate Management Admission Test (GMAT) using a well-known preparation class and
was thrilled to receive a total score of 770. Her friend Eric, however, thinks she would have scored just as well without
the class.
To test the efficacy of the class, they obtain a small but random sample of 19 test results from other students using the same
class. This sample's average is 568.56 with a standard deviation of 116.72. In comparison, the national average was 550.12.
Assume the population's results are normally distributed but that its standard deviation is not known.
Kitty and Eric decide to perform a two-tailed t-test at a significance level of a = 0.05. How many degrees of freedom should
they use in their calculations?
df =

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