Exam 17: Statistical Methods

A frequency polygon is a

When you reject the null hypothesis,

On the SAT,the mean is 500 and the standard deviation is 100.If you scored 2 standard deviations above the mean,your score would be

A numerical index of the degree of relationship between two variables is known as the

In research,the assumption that no relationship exists between two variables is referred to as the

A graph in which paired X and Y scores for each subject are plotted as single points is called a

Inferential statistics are designed to

Toshi has collected data for her research.She wants to create an orderly arrangement of scores that would indicate the frequency of each score; she would be MOST likely to use a

Frank scored 30 on a test of assertiveness.Assuming that assertiveness is normally distributed with a mean of 20 and a standard deviation of 5,what percentage of people are less assertive than Frank?

As the magnitude of a correlation coefficient increases,the

The median is determined by

Your psychology professor wants to organize and summarize the scores on the first psychology test; which type of statistics is your professor MOST likely to use?

When a frequency polygon has a sharp peak near the center,and very few scores away from the center,you would expect that

Eric has collected data on the relationship between the number of hours the employees at a large number of corporate headquarters spend working on their computers and the profits of the corporations.His scatter diagram of the data shows it clusters near a line running from the bottom right corner to the top left corner.This shows the correlation is

The statistical concept of ____ refers to how much the scores in a distribution of scores tend to vary or depart from the mean.

The marketing agent for a professional sports franchise conducts a survey asking people how much they support the construction of a new sports stadium.Almost everyone who takes part in the survey indicates they are strongly in favor of a new stadium; there are just a few respondents who think a new stadium would be a bad idea.When the results from the survey are plotted in a histogram,the distribution will be

If you take a test in which the scores are normally distributed and you score at the 40th percentile,you have scored ____ the mean and ____ the median.

Stefan has collected a large amount of data in a study designed to test the effectiveness of a new drug meant to slow the progression of Alzheimer's disease.To organize and summarize his data,which type of statistics would he use?

The use of statistics to organize and summarize data BEST describes the purpose of

If you add all the scores in a group of scores together and divide by the number of scores,the result is the