Exam 6: Descriptive Statistics

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 standard deviation of this distribution?

A negative z-score is

If the difference between r and zero is doubled, the portion of Y variance associated with X variance is

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 median of this distribution is

The mean of the squared deviation scores is called

Correlating the scores of 50 students on two tests, an investigator found that the sum of the z-score cross-products was 20.The Pearson's product moment coefficient in this case is:

In a positively skewed distribution:

There is no relationship between variables when the correlation is ____.

A Z-score of 51 is equal to a z-score of

A stanine score of six would have a T-score of

An investigator found ____ when correlating weight and sex drive among adult males of average height, which led him to conclude that a fat man is more likely to have high sex drive than a thin man.

The coefficient of determination of an r = -.60 is

Why do effect sizes have universal meaning?

Meta-analysis is used for

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 mean for this distribution is

Why is the mean the most widely used measure of central tendency?

The mean of all z-scores in a distribution is equal to

Which of the following is not true of the normal curve?

Mary had a z-score of zero on the Graduate Record Examination and a percentile rank of 50 on the Law School Aptitude Examination.We can say

With a population of 100 children aged 7 through 14, we would expect ____ between height and reading vocabulary.