What are two ways to test the equality of population variances? Explain in detail.
What are two ways to test the equality of population variances? Explain in detail.
In a two-tailed F-test about equality of two population variances, given n1=21, S21 = 8.2, n2=26, S22= 4.0, and alpha = 0.05. The numerator and denominator degrees of freedom for the F distribution, respectively, are A. 21 and 26 B. 26 and 21 C. 20 and 25 D. 27 and 22
The test statistic used in the F test for the equality of two variances is calculated as F = s12/s22. In this formula, s12and s22 represent the sample variance for sample 1 and sample 2, respectively. True or False?
In a two-tailed F-test about equality of two population variances, given n1=21, S21 = 8.2, n2=26,S22= 4.0, and alpha = 0.05. The numerator and denominator degrees of freedom for the F distribution, respectively, are: The computed value of the test statistic, F, is: The critical value of F, from F chart or using MS Excel, is: The p-value, from F chart or using MS Excel, is: The conclusion is to reject H0. True or False?
What is the null hypothesis for Levene’s Test for Equality of Variances? Tested at a .05 level of significance, the Levene’s F-test in the output shows that a.Means are significantly different b.Means are not significantly different c.Variances are significantly different d.Variances are not significantly different What is the null hypothesis to test the statement that the average amount of days spent doing homework is different for males and females? What is the alternative hypothesis to test the statement that the...
2. *(15 points). For these data, you will first need to test for equality of variances, and then apply the appropriate two-sample test to test differences between means. A group of students are randomly assigned to one of two classes. Class 1 uses a traditional lecture- and discussion method of teaching biochemistry. Class 2 uses the "Keller Plan," a self- paced method where students study units of biochemistry independently and then take short tests on each unit. At the end...
In testing the equality if the two means below, what is the test statistic? (Assume the populations have equal variances) Hi! I entered this into the calculator and got an answer that didn't match any of my options. I got 0.1285. Can someone please show me how to enter it into the calculator? QUESTION 5 In testing the equality of the two means below, what is the test statistic? (Assume the populations have equal variances) Sample 1 Sample 2 Sample...
In a test for determining whether two population variances are the same or different, the larger the sample sizes from the two populations, the lower will be the chance of making a Type I statistical error. A) True . B) False
There are several ways to diagnose cholera. Give three ways and explain each in detail.
True or false? When the population variances are known, the test statistic that we use to compare two population means using two independent samples follows the standard normal distribution. True or false? A paired t-test with two columns of 8 observations in each column should use d.f =7
IT Project Management: Explain in detail and give 3 references: What are some ways to identify project stakeholders? Which stakeholders do you think are often not identified when they should be?