Answered: 3. Which of the following is not… | bartleby

Algebra & Trigonometry with Analytic Geometry

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.8: Probability

Problem 31E

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3. Which of the following is not correct?
a) a high R2 does not mean that the regression is correct
b) a high R2 does not mean that there is no omitted variable bias
c) one should always choose a regression with a higher R2.
d) a high R2 does not necessarily mean that you have the most appropriate set of
regressors

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A researcher expects a treatment to increase the scores for individuals in a population. The treatment is evaluated using a one-tailed hypothesis test, and the test produces z = +2.40. Based on this result, which is the correct statistical decision
Consider a regression analysis with n = 47 and three potential independent variables. Suppose that one of the independent variables has a correlation of 0.95 with the dependent variable. Does this imply that this independent variable will have a very large Student’s t statistic in the regression analysis with all three predictor variables?
Which statement regarding dependent t-tests is false? A. One disadvantage is called the “carry effect” where a subject’s performance may improve simply because they’ve experienced the test for a second time. B. One advantage is that, because the pre and post test groups are made up of the same subjects, there is no variance from subject to subject. C. One advantage is that, because the pre and post test groups are made up of the same subjects, extraneous variables are automatically controlled for. D. None of the above.
Which statement regarding dependent t-tests is false? A. One disadvantage is called the “carry effect” where a subject’s performance may improve simply because they’ve experienced the test for a second time. B. One advantage is that, because the pre and post test groups are made up of the same subjects, there is no variance from subject to subject. C. None of the above.
The test statistic of z=2.40 is obtained when testing the claim that p>0.7. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. Find the P-value. Using a significance level of α=0.10, should we reject H0 or should we fail to reject H0?
The test statistic of z = 2.05 is obtained when testing the claim that p > 0.4. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. Find the P-value. Using a significance level of α = 0.10, should we reject H0 or should we fail to reject H0?

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