Descriptive Statistics

Question 1

What are the 2 types of descriptive statistics?

Answer 1

Measures of central tendency

Measures of dispersion

Question 2

What are the measures of central tendency!

Answer 2

Mode

Median

Mean

Question 3

How do you find the mean?

Answer 3

Add all scores & divide by number of scores

Question 4

What are key features of the mean?

Answer 4

+ Representative of all data collected

• Can be distorted by extreme values
• May not be an actual score in the set

Question 5

How do you find the median?

Answer 5

Arrange data in order and find the middle score

Question 6

What are key characteristics of the median

Answer 6

+ Unaffected by extreme scores

• Not representative of all findings

Question 7

How do you find the mode?

Answer 7

Most frequent value in data set

Question 8

What are the key characteristics of the mode?

Answer 8

+ Unaffected by extreme values

• Doesn’t tell us anything about the other scores in the data

Question 9

What are the measures of dispersion?

Answer 9

Range

Standard Deviation

Question 10

What is the range?

Answer 10

Difference between highest & lowest scores

Question 11

What are the key characteristics of the range?

Answer 11

+ Quick & easy to calculate

• Can easily be distorted by extreme values

Question 12

What is standard deviation?

Answer 12

The average amount that the scores differ from the mean

Question 13

What are the key characteristics of standard deviation?

Answer 13

+ Representative of all scores

• More difficult to calculate