Unit 13: Descriptive Statistics

Question 1

Descriptive statistics

Answer 1

Analyzing tables and graphs qualitatively

Providing information about central tendency, width, shape and distribution

Question 2

Mean

Answer 2

• Affected by extreme scores

* Sum of scores / # of scores

Question 3

Median

Answer 3

Middle

Question 4

Mode

Answer 4

Most frequent

Question 5

Range

Answer 5

Difference between lowest and highest

Question 6

Standard Deviation

Answer 6

Average distance of all scores from the mean or central point in a distribution

Question 7

Variance

Answer 7

Standard deviation squared

Question 8

Kurtosis

Answer 8

Measure of peakedness

Question 9

Mesokurtic
Leptokurtic
Platykurtic

Answer 9

Middle
Tall
Flat

Question 10

Positively Skewed Distribution

Answer 10

Left

Question 11

Negatively Skewed Distribution

Answer 11

Right

Question 12

Z-Score

Answer 12

A number that indicates how many standard deviation units a raw score is rom the mean of the distribution
population - mean / standard deviation
(+) above the mean
(-) below the mean

Question 13

u
o
x
s

Answer 13

population mean
standard deviation
sample mean
standard deviation