Exam 81: Understanding Descriptive and Inferential Statistics for Psychological Research

Frequency distributions provide a method of

Ken and his twin sister Katy both took the same psychology test but in different classes.On his psychology test,Ken had a score of 110 in a class with a mean of 100 and a standard deviation of 10,while his twin sister Katy had a score of 118 in a class having a mean of 100 and a standard deviation of 18.Which statement is TRUE?

Explain what is meant by a correlation between two variables,how one would know if a correlation coefficient were weak or strong,and what constitutes a perfect relationship;describe what is meant by positive,negative,and zero correlations and give an example of each.

Gayle had a score of 80 in a class with a mean of 70 and a standard deviation of 5.Her z-score is

Given these scores 22,44,33,55,33,22,44,22,55,22,the mode is _______ .

The degree of relationship between two measures is depicted by a

A mathematical relationship in which increases in one measure are matched by increases in the other (and decreases correspond with decreases)is a

In order to convert a number to a z-score,it is necessary,within a group of scores,to know the mean and the

In order to clearly visualize the correlation,Dr.Amott should construct a

After administering a unit test to her psychology students,a college professor calculates the mean and range for this test in order to better understand the performance of her students on the material in this unit.This professor is using _______ statistics.

The relationship between anxiety level and classroom test scores would probably

Which type of statistics are used for decision-making,for generalizing from small samples,and for drawing conclusions?

In order to make decisions regarding the best reading program to use,Hope will be generalizing from the results of small samples of students.Hope is using _______ statistics.

For the results of Dr.Mosley's experiment to be regarded as statistically significant,his results must have a chance probability of _______ or less.

Melissa is using the three measures of central tendency,which are types of

The psychology test scores for five students are 100,82,96,75,and 90.For this distribution of scores,the range is

On a normal curve,the percent of all cases found between a z-score of +1 and a z-score of -1 is _______ percent.

A small,randomly-selected part of a larger population that accurately reflects characteristics of the whole population is a _______ sample.

Which of the following is NOT one of the three types of descriptive statistics?

If a correlation is -1.00,then which type of relationship exists?