Exam 6: Descriptive Statistics

A schedule for trains from Chicago to New Orleans in one column shows how far each stop on the route is from Chicago and in another column how far the same stops are from New Orleans.The correlation between the two columns is ____.

How are Cohen's d and Smith and Glass's ? alike.How are they different?

Why is standard deviation usually preferred to range as a measure of dispersion?

A third study with 2,000 subjects found an experimental group mean of 29.26 (SD = 2.5) and a control group mean of 29.26 (SD = 1.5).What is the average effect size of the three studies?

Which standard score has a mean of 0 and a standard deviation of 1?

The sign of the Pearson's r is related to the strength of the relationship.

Exhibit 6-2: Use the distribution for the following questions.51, 52, 55, 56, 57, 57, 57, 58, 59, 59, 60, 60, 60 -Refer to Exhibit 6-2.The mode of this distribution is

A student who sometimes scores high and sometimes scores low on a series of weekly tests will have a higher ____ than a student who makes the same score week after week.

The coefficient of determination reveals

The difference between experimental group mean and control group mean divided by the standard deviation of the control group is called the

Exhibit 6-3: Use the distribution for the following questions.51, 52, 55, 56, 57, 57, 57, 58, 59, 59, 60, 60, 60 -Refer to Exhibit 6-3.What is the range of this distribution?

A distribution with the mean lower than the median:

The size of the correlation between achievement test scores and school grades might be smaller in which population?

Exhibit 6-4: Use the data for the following questions.Score 1: 34, 40, 42, 24, 30; Score 2: 40, 38, 41, 49, 42 -Refer to Exhibit 6-4.Compute the Pearson's r from the data.

Exhibit 6-5: Indicate your choice of statistics for solving the following questions. -Refer to Exhibit 6-5.We want to know how spread out or heterogeneous the scores of a class are.

If the standard deviation of the score on this test is zero, we should conclude

Which of the following is an above-average score?

Exhibit 6-5: Indicate your choice of statistics for solving the following questions. -Refer to Exhibit 6-5.We want to know how well the class as a whole did on an examination.

An investigator found strong evidence that elderly teachers and young teachers scored low on an aptitude test while middle-aged teachers scored high on this test.This is an example of

The Pearson's product-moment correlation describes the relationship between variables by