Statistics

descriptive statistics

mathematical summaries of results

A negative correlation _____.

means one variable goes up and the other goes down

correlation

relationship between two variables

mean

sum of all numbers divided by the total number of scores; the average

median

the middle number in a set of ordered numbers

mode

the number that occurs most often in a given set of numbers

Descriptive statistics are useful because _____.

you can analyze results and draw conclusions

What is the mean of 4, 6, 8, 20, 12?

10

What is the median of 5, 7, 2, 4, 3? (Remember to place the numbers in order first.)

4

What is the mode of 4, 7, 7, 7, 4, 6, 6, 6, 7?

7

What is the median of 6, 7, 9, 12, 15?

9

What is not a reason correlations are useful?

Correlations allow you to determine causes.