Exam 20: Appendix B: Behavioral Statistics

If the mean of a test is 80 and the standard deviation is 10, a person with a z-score of -2.0 scored _____ on the test.

Professor Waters calculated the mean, median, and mode of the scores made on the midterm exam.These descriptive statistics are known as the measures of _____.

Correlations allow us to make _____, while experiments allow us to show _____.

Tests of _____ provide an estimate of how often experimental results could have occurred by chance alone.

Choosing a sample so that each member of the population has an equal chance of being included in the sample is called _____.

A bell-shaped distribution, with a large number of scores in the middle, tapering to very few extremely high and low scores is known as a(n) _____.

In order to convert a number to z-score, it is necessary to know the _____ and the standard deviation of a group of scores.

The index of how much a typical score differs from the mean of a group of scores is known as the _____.

What is a z-score? Explain how it is calculated in the following example: Abby had a score of 75 on a test with a mean of 70 and a standard deviation of 5.What is her z-score?

If you square the correlation coefficient, you will get a number telling the _____ accounted for by the correlation.

Explain the purpose of tests of statistical significance, how the results of these tests are stated, and what is considered significant for most psychological experiments.

Ninety-nine percent of all the cases are found between _____ on a normal curve.

The median is a measure of _____, while the range is a measure of _____.

A(n) _____ is the existence of a consistent, systematic relationship between two events, measures, or variables.

You are a teacher.In one of your classes, the students achieved the following raw scores on a ten-question quiz: 10, 10, 9, 9, 9, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 2 2.Calculate each of the measures of central tendency for these scores.

Describe the function of the measures of variability; and name and define two of these measures.

The most commonly used correlation coefficient is called the _____.

The Jones have five children aged three, five, seven, 10 and 12.The median age of the Jones children is _____.

What is the percent of variance, and how is it calculated?

The results of a test of significance are stated as a(n) _____.