Unit 1: Modue 1c: Statistics: Central Tendency & Variability

Question 1

Statistics

Answer 1

The use of mathematics to organize, summarize, and interpret numerical data

Question 2

Frequency Distribution

Answer 2

An orderly arrangement of scores indicating the frequency of each score or group of scores

Question 3

Histogram

Answer 3

A bar graph that presents data from a frequency distribution

Question 4

Frequency Polygon

Answer 4

A line figure used to present data from a frequency distribution

Question 5

Descriptive Statistics

Answer 5

Statistics used to organize and summarize data

Question 6

Measures of Central Tendency

Answer 6

Mean, Median & Mode; give us an indications regarding the typical score in a data set

Question 7

Mean

Answer 7

The arithmetic average of the scores in a distribution

Question 8

Median

Answer 8

The score that falls exactly in the centre of a distribution of scores

Question 9

Mode

Answer 9

The score that occurs most frequently is a distribution

Question 10

Mean Calculation

Answer 10

= (total of scores)/# of scores

Question 11

Negatively Skewed Distribution

Answer 11

A distribution in which most scores pile up at the high end of the scale

Question 12

Positively Skewed Distribution

Answer 12

A distribution in which most scores pile up at the low end of the scale

Question 13

Challenges with skewed distribution

Answer 13

The mean may be misleading and the median often provides the best index of central tendency

Question 14

Variability

Answer 14

Refers to how much the scores in a data set tend to vary from each other and the mean score

Question 15

Standard Deviation

Answer 15

An index of the amount of variability in a set of data

Question 16

Relationship b/w variability and standard deviation

Answer 16

Direct Correlation