Psychology Statistics

1.

Multiple Choice

45 sec

1 pt

A frequency distribution

is a way to present data visually in a table

depicts a correlation between two variables using a histiogram

is the same thing as a scattergram

typically lists the frequency of each score on the horizontal axix

2.

Multiple Choice

1 min

1 pt

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?

descriptive statistics

inferential statistics

correlational statistics

significant statistics

3.

Multiple Choice

1 min

1 pt

You psychology professor wants to describe the average score on your first psychology test. Which measure of central tendency is your professor most likely to use?

mean

median

mode

harmonic mean

4.

Multiple Choice

30 sec

1 pt

Which measure of central tendency is obtained by adding all the scores and dividing that total by the number of scores?

mode

median

mean

range

5.

Multiple Choice

30 sec

1 pt

Scores pile up at the low end of the scale in

a negatively skewed distribution

a positively skewed distribution

any skewed distribution

a normal distribution

6.

Multiple Choice

2 mins

1 pt

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

positively skewed

symmetrical

impossible to predict without more information

negatively skewed

7.

Multiple Choice

1 min

1 pt

Dr. Kleiman gives an exam where most of the students receive failing grades and only a few students receive high scores. When the exam scores are plotted, the distribution will be

positively skewed

negatively skewed

symmetrical

impossible to predict without more information

8.

Multiple Choice

45 sec

1 pt

In a strongly skewed distribution, the best indicator of central tendency is usually the

mean

median

mode

standard deviation

9.

Multiple Choice

30 sec

1 pt

When scores are "bunched up"in the center of a distribution, the

mean will be relatively low

standard deviation will be relatively low

correlation coefficiaent will be a negative number

standard deviation will be relatively high

10.

Multiple Choice

1 min

1 pt

The standard deviation

indicates the average difference between each score in a group and the mean for that group of scores

reveals the degree of skew for a a group of scores

is sensitive to scores at the extremes of a distribution of scores

is used to determine whether a data set is positively or negatively skewed

11.

Multiple Choice

1 min

1 pt

The symmetric, bell shaped curve that represents the pattern in which many human characteristics are dispersed in the population is known as

scatter plot

normal distribution

frequency polygon

histogram

12.

Multiple Choice

1 min

1 pt

Julia has an IQ of 130. If the mean for IQ is 100 with a standard deviation of 15, what percentage of the population has an IQ greater that Julia's (assume a normal distribution)?

0 percent

2.5 percent

32 percent

50 percent

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