When investigating a question involving two nominal variables, the appropriate test to employ is a chi-square test of independence. True False
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When investigating a question involving two nominal variables, the appropriate test to employ is a chi-square test of independence.
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- so what would the t test equal to?For a hypothesis test of the claim that the mean amount of sleep for adults is less than 8hours, technology output shows that the hypothesis test has power of 0.4444 of supporting the claim that μ<8 hours of sleep when the actual population mean is 6.0 hours of sleep. Interpret this value of the power, then identify the value of β and interpret that value.For a hypothesis test of the claim that the mean amount of sleep for adults is less than 9 hours, technology output shows that the hypothesis test has power of 0.4826 of supporting the claim that μ<9 hours of sleep when the actual population mean is 7.5 hours of sleep. Interpret this value of the power, then identify the value of β and interpret that value.
- A contingency table for two nominal variables has three (3) row and four (4) columns. The number of degrees of freedom associated with the chi-square test of variable independence will be df= 6. True or False?What are the underlying assumptions of the t test you use in ?For each of the following examples, state whether the chi-square goodness-of-fit or the chi-square test for independence is appropriate. 15a. An instructor tests whether class attendance (low, high) and grade point average (low, average, high) are independent. A. goodness of fit test B. test for independence 15b. An educator tests whether the teacher's speaking style (monotone, dynamic) and student interest (low, high) are independent. A. goodness of fit test B. test for independence 15c. A sports psychologist compares the number of athletes with Type A or Type B personality traits. A. goodness of fit test B. test for independence
- A researcher believes that more than half of college students average less than 6 hours of sleep per night during the week. Suppose she collected data to test her belief and found a p-value < 0.0001. Fill in the information for her hypothesis test below. p = a. p = 0.05 b. p = 0.0001 c. p < 0.0001 d. p > 0.0001A manager wants to see if geographical region (Cape Town, Durban and Gauteng) is related with ownership of a tablet (“Have a tablet” and “No tablet”). If the Chi-square test statistics = 0.412, what conclusion is most appropriate? A. Since Chi-square test statistics > Chi-square critical value, do not reject H0 B. Since Chi-square test statistics < Chi-square critical value, do not reject H0 C. Since Chi-square test statistics > Chi-square critical value, Reject H0 D. Since Chi-square test statistics < Chi-square critical value, Reject H0The Chi-square test can be used with two or three variables. O TrueO False
- Pet Owners A study of pet owners showed the following information concerning the ownership of the dogs and cats. At =α0.10 , is there a relationship between the number of people in a family and dog or cat ownership? Use the critical value method with tables. 1 person 2 people 3 people 4 or more people Dog 5 15 10 25 Cat 10 15 15 15 1)State the hypotheses and identify the claim. H0: Pet ownership is ▼(DEPENDANT ON or INDEPENDANT OF?) the number of people living in the household. (CLAIM OR NOT CLAIM?) H1 : Pet ownership is (DEPENDANT ON or INDEPENDANT OF?) the number of people living in the household. (CLAIM OR NOT CLAIM?) 2. Find the critical value 3. Compute the test value: X^2= 4. Reject or Do not reject the null hypothesis 5. Summarize: Is there or is there not enough evidence to reject the claim?Is there or is there not enough evidence to support the claim?28. A Chi-Square test for independence was done to see whether the type of salad dressing people order at a restaurant and the type of meat they order are independent or dependent. If the P-value was found to be 0.02, then at a 5% level of significance it can be concluded that dressing type and meat type are dependent.A sample of non-English majors at a selected college was used in a study to see if the student retained more from reading a 19th-century novel or by watching it in DVD form. Each student was assigned one novel to read and a different one to watch, and then they were given a 20-point written quiz on each novel. The test results are shown below. At =0.05, can it be concluded that the book scores are higher than the DVD scores? Required: Test Value Only the final answer should be rounded-off to TWO decimal places.