In assessing the validity of any test of hypotheses, it is good practice to answer the following question: a) test the hypotheses at several different levels of significance b) examine the probability model by using exploratory data analysis on the data c) test both one- and two-sided hypotheses to help guarantee consistency d) All of the above
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Step 1: In assessing the validity of any test of hypotheses, it is good practice to answer the following question: a) test the hypotheses at several different levels of significance, b) examine the probability model by using exploratory data analysis on the data, Show more…
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(a) In a hypothesis testing context, before examining the data, one should A. decided whether the alternative hypothesis is one-sided or two-sided. B. compute the p-value for the test. C. decide whether or not to reject the null hypothesis. D. All of the above. (b) In general, there is more information provided by . A. a p-value than a confidence interval. B. a sample statistic than a confidence interval for the corresponding parameter. C. a confidence interval than a p-value. D. All of the above.
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When performing a hypothesis test, the hypothesis (or hypotheses) that is assumed to be true during the process of the test is Select the best answer. A) both the null and the alternative hypotheses. B) the null hypothesis. C) neither the null or the alternative hypothesis since you are the one performing the hypothesis test. D) the alternative hypothesis.
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A professor claims that the average grade of students in her courses is 80%. Identify the confidence for this claim. A. Reject the claim that the average grade is 80% when it is actually 80%. B. Fail to reject the claim that the average grade is 80% when it is actually different from 80%. C. Reject the claim that the average grade is 80% when it is actually different from 80%. D. Fail to reject the claim that the average grade is 80% when it is actually 80%. 2. A(n) ______ is appropriate when there is(are)_______ independent group(s) and ______ measurement(s) per individual in the population. A. One-sample t test, 1, 1 B. One-way ANOVA, more than 2, more than 2 C. Independent samples t test, 2, 2 D. Paired samples t test, 2, 1 3. A(n) ______ is appropriate when there is(are)_______ independent group(s) and ______ measurement(s) per individual in the population. A. One-sample t test, 1, 2 B. Independent samples t test, 2, 1 C. One-way ANOVA, more than 2, more than 2 D. Paired samples t test, 2, 1 4. All of the following mathematical/logical operations can be performed for a variable measured on an ordinal scale except? A. = B. > C. < D. ÷ 5. All of the following statements are true except ______. A. Level of significance always lies between 0 and 1 B. Power + probability of Type II error = 1 C. Level of significance is another name for the probability of Type II error D. Probability of Type I error + confidence level = 1
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