Exam 81: Understanding Descriptive and Inferential Statistics for Psychological Research

When the scores are close together,the number representing this variability will be

Carla and her five girlfriends went shopping and spent $20,$12,$13,$8,$13,and $9,respectively,on cosmetics. The mode of their expenditures is

A scatter plot in which all the points fall in a straight diagonal line would be characteristic of two sets of variables which

Dr.Rodriguez discovers that the more education people have,the more money they tend to earn.Dr.Rodriguez has discovered a

A major requirement for a sample to be used in psychological research is that it be

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

Regarding the mode,which of the following statements is FALSE?

Jeff is using a measure that will indicate how many standard deviations above or below the mean a score is.The measure being used by Jeff is called a

To decide which applicants have the best chance for academic success,most colleges have formulas that use _______ correlations.

A frequency distribution is made by breaking down the entire range of possible scores into classes of equal size and then recording the number of scores falling into each class.

Experiments allow us to

If the correlation between the IQs of identical twins is .86,then,in any group of identical twins,what percent of the variation in the "Y" twins' IQs is accounted for by knowing the IQs of their identical siblings (the "X's")?

Regarding frequency distributions,which of the following statements is FALSE?

Dr.Lancer noted in his observations that people who are susceptible to hypnosis are also more likely to listen to music.Dr.Lancer is describing a relationship called a

A histogram can be described as a type of

The existence of a consistent,systematic relationship between two events,measures,or variables refers to

Meg is using a procedure to choose her sample so that each member of the population for her study has an equal chance of being included in her sample.Meg is using a procedure known as _______.

In psychology,an experimental result would be considered significant if it had a probability of _______ or less.

Ninety-five percent of all cases are found between a standard deviation of +2 and a standard deviation of -2 on a normal curve.

The Pearson r is the most commonly used