For what purpose is a chi-square homogeneity test used?Choose the correct answer below.O A. To compare the distributions of a variable of two or more populationsB. To decide whether two variables are associatedC. To perform a hypothesis test for the distribution of a variable

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Answered: For what purpose is a chi-square…

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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A fitness trainer is interested in investigating whether ethnicity and the first exercise activity that members engage in are dependent. The table below shows the results of the trainer's observation of randomly selected members. Frequencies of Ethnicity and Exercise Activity Weight Machines White Hispanic Black Other Cardio 84 84 68 48 98 97 51 70 O Homogeneity O Independence Free Weights 81 98 69 41 What can be concluded at the α = 0.05 significance level? a. What is the correct statistical test to use? O Goodness-of-Fit Paired t-test b. What are the null and alternative hypotheses? Ho: O Ethnicity and first exercise activity are dependent. O Ethnicity and first exercise activity are independent. O The distribution of first exercise activity is not the same for each ethnicity. O The distribution of first exercise activity is the same for each ethnicity. H₁: O The distribution of first exercise activity is the same for each ethnicity. O Ethnicity and first exercise activity are…
When we test the hypothesis that the population proportions are equal, we can use the Z test for a one-sided as well as a two-sided alternative. Select one: a. False b. True C. Not sure
What is stated by the null hypothesis for the chi-square test for independence? a. There is no relationship between the two populations regarding the two variables. b. Both variables have the same frequency distribution. c. The two variables have different frequency distributions. d. There is a relationship between the two populations regarding the two variables.
Find A. Hypothesis and identify claim B. Compute test value C. Find p value D. Make decision E. Summarize results
Violation of which assumption below for the two-factor ANVOA is not a cause for concern with large sample sizes? a. The populations from which the samples are selected must have equal variances. b. The populations from which the samples are selected must be normal. c. A violation of any assumption below would be a concern, even with large sample sizes. d. The observations within each sample must be independent.
Which of the following statistics are unbiased estimators of the population parameter? Select all that apply. A) Sample mean B) Sample proportion C) Sample range
Which of the following most accurately describes a statistical hypothesis test? a technique that uses population data to make inferences about an unknown sample statistic a technique that allows researchers to describe a known sample O a technique that allows researchers to describe a known population O O O O a technique that uses sample data to draw inferences about an unknown population parameter
3. Can SAT scores predict college performance? Let x be a variable that represents SAT score of a computer science major, and let y be a variable that represents a student’s GPA upon graduation. A random sample of n =15 computer science majors provided their SAT scores and GPAs: x 1232 1070 1086 1287 1130 1048 1121 1095 1135 1208 1333 1160 1186 1243 1261 y 3.52 2.91 2.4 3.47 3.47 2.37 2.4 2.24 3.02 3.32 3.59 2.54 3.19 3.71 3.58 The scatter diagram for the SAT score and GPA is given below: (a) Find the sample correlation coefficient r. Truncate to two decimal places. What does the value tell you about the data? (b) Find the equation of the least squares line . Truncate to four decimal places. What does the slope mean? (c) Find the value of the coefficient of determination . Truncate to two decimal places. What does this number mean? (d) What is the predicted GPA if a computer science major got a…
What does the t test for the difference between the means of 2 independent populations assume? A. The sample sizes are equal. B. The sample variances are equal. C. The populations are approximately normal. D. All of the above
Determine the null and alternative hypotheses

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For what purpose is a chi-square homogeneity test used? Choose the correct answer below. O A. To compare the distributions of a variable of two or more populations B. To decide whether two variables are associated C. To perform a hypothesis test for the distribution of a variable