______ is one way to understand the relationship between two variables that occur at the same time.

..... is the most frequent value that is present in your data.

A study finds that children who spend more hours in TV viewing score lower class grades in school. This correlation is an example of:

Arranging your target population in an ordered scheme from which participants or items are chosen at regular intervals is an example of:

When a researcher doesn't know much about a certain problem and wants to gain more information about it, which research design will he use?

The _____ is a useful tool for assessing whether the means of two groups of variable are statistically different from each other.

Which of the following statements are true? 1. Categorical variables are the same as qualitative variables. 2. Categorical variables are the same as quantitative variables. 3. Quantitative variables can be continuous variables.

_____ data is an example of nonmetric data.

What is the first moment of distribution?

Suppose c is a constant number. Calculate var(c).

The probability of a discrete value in a continuous distribution is equal to __?