Stats Help for College-level Students

Intro to Statistics Question

What kind of test would be used to test the equality of two variances? a. z test b. t test c. chi square d. f test

Statistics Question

What will the correlation coefficient be close to if a strong negative relationship exists? a. +1 b. -1 c. 0 d. .5

Statistics Question

A calculus teacher wants to find out if her class's test scores are correlated to their overall grade point average. The data of the student's test scores and their corresponding grade point averages are found in the table below. Calculate the correlation coefficient. Test score 98 105 100 100 106 95 116 112 _ ...continues

Statistics Question

Find the coefficient of non-determination for the correlation coefficient r=0.37. a. 0.8631 b. 0.1369 c. 0.7549 d. 0.6302

Statistics Question

Which is not an assumption of the chi-square goodness-of-fit test? a. the data obtained by a random sample. b. the expected frequency for each category must be at least five. c. the expected frequency for each category must be at least three. d. All are assumptions of the test

Intro to Statistics Question

What contingency table test is used to see if there is a difference in the frequency distribution for two different groups? a. tests for dependency b. tests for independence c. tests for homogeneity of proportions d. None of the above

Statistics Question

A pizza store chain wats to see which pizza toppings customers seem t olike the best. A random sample of people were asked about their pizza preferences. At an alpha value of 0.01, find the test value for the data provided in the following table. Toppins pepperoni sausage mushroom onion No. sold 12 ...continues

Statistics Question

what is the difference between WITHIN GROUP VARIANCE and BETWEEN GROUP VARIANCE? a. with group varinace estimates the population variance using all the data values, and between group variance estimates the population variance using the means b. Within group variance estimates the population variance using the means, and betw ...continues

Intro to Statistics Question

Which is not an assumption for the ANOVA? a. the samples from the populations must be normally distributed b. the variance of the populations must be equal c. the samples must be independent of each other d. the samples must be dependent on each other

Intro to Statistics Question

Which is not an assumption of hte Kruskal-Wallis test? a. each sample has five or more values b. the populaion is not normally distributed c. when the variances are not equal d. all of the above are asssumptions of the Kruskal-Wallis test