Exam 3: A Statistics Refresher

In doing research on family therapy,a researcher reports on the number of children in each family studied.This reporting on the number of children in each family is BEST described as which type of scale?

A correlation coefficient is equal to .30.Using the concept of coefficient of determination,the variance accounted for by chance,error,and other unexplained factors would be:

Most scores on tests that measure psychological variables

Numbers are assigned to each player on the university basketball team.This use of numbers could BEST be characterized as

The main purpose of using statistics is

Miles-per-hour is an example of which type of scale?

The purpose of deriving a standard deviation of a distribution is

Which quartile may also be referred to as the median?

Kate received a z score of 1 on a reading test.What do we know about Kate's performance,assuming that the reading test scores are distributed normally?

A perfect correlation is indicated by

If a particular measure yields scores that are normally distributed,this may be characterized as a desirable feature of that measure.A normal distribution of scores is desirable because

If a person scores at the median on a test,and if the scores on the test are normally distributed,the individual will be in which stanine?

T scores have a mean of ________ and a standard deviation of ________.

What do ordinal and nominal scales have in common?

How wide is the interval encompassed by a stanine?

Raw scores may be converted to standard scores

Which of the following is always located between the first quartile (Q1)and the third quartile (Q3)?

Correlation coefficients range from -1 to:

The mean should be chosen as the measure of central tendency when the distribution is

A scatterplot of the relationship between two variables is graphed upward and sloping to the right.This is indicative of