Questions from Essentials of Statistics

Q: We stated earlier that, if two variables are not associated,

We stated earlier that, if two variables are not associated, there is no point in looking for a causal relationship. Why is that so?

Q: Studies have shown that a positive association exists between educational level and

Studies have shown that a positive association exists between educational level and annual salary; in other words, people with more education tend to make more money. a. Does this finding mean that mo...

Q: How do we identify an F-distribution and its corresponding F

How do we identify an F-distribution and its corresponding F-curve?

Q: Identify three techniques that can be tried as a remedy when one

Identify three techniques that can be tried as a remedy when one or more of the expected-frequency assumptions for a chi-square independence test are violated.

Q: Find the required F -values. For an F-

Find the required F -values. For an F-curve with df = (6, 10), find a. F0.05. b. F0.01. c. F0.025.

Q: We have given the number of possible values for two variables of

We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption...

Q: One-way ANOVA is a procedure for comparing the means of

One-way ANOVA is a procedure for comparing the means of several populations. It is the generalization of what procedure for comparing the means of two populations?

Q: Use Table V to find the required χ2-values. Illustrate

Use Table V to find the required χ2-values. Illustrate your work graphically. For a χ2-curve with df = 10, determine a. χ20.05. b. χ20.025.

Q: If we define s = √MSE, of which parameter is

If we define s = √MSE, of which parameter is s an estimate?

Q: We have given the number of possible values for two variables of

We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption...