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School

University of Texas, Dallas *

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Course

6301

Subject

Statistics

Date

Jan 9, 2024

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jpeg

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Uploaded by CountBook10605

Question 3 4 out of 4 points In a random sample of 20 patients who visited a clinic at Medical Center |, a researcher found that the variance of the waiting time (in minutes) was 128.0. In a random sample of 15 patients in the clinic of Medical Center 2, the researcher found the variance to be 178.8 If we want to test at the 5% level of significance that the population variances differ. what 1s the value of the test statistic? Selected Answer: @ a. 0.716 Answers: @ a. 0716 b. 0.377 c. 2.65 d.2.86 Question 4 0 out of 4 points Two random samples of 40 students were drawn independently from two populations of students. Assume their aptitude tests are normally distributed (total points = 100). The following statistics regarding their scores in an aptitude test were obtained: ;1=76. $1=8 ;2=72. 52=6.5 We want to test at the 5% significance level to determine whether the population variances are equal. What is the value of test statistic? Selected Answer: @ g 2.45 Answers: a 123 b. 1.99

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