Chapter 2

Question 1

Descriptive Statistics

Answer 1

summarize and describe a certain sample or population

CANNOT be used to make generalizations or predictions

Question 2

Inferential Statistics

Answer 2

making predictions or generalizations about a larger population based on a smaller sample

Question 3

Sample Statistics

Answer 3

Roman letters used to represent the descriptive measures of a sample

AKA: point estimate

Question 4

Population Parameters

Answer 4

Greek symbols used to represent the descriptive measures of a population

Question 5

Sample or Population Size

Answer 5

n or N

Question 6

Frequency Distribution

Answer 6

a data summary that shows the number of observations in each class

Question 7

Relative Frequency

Answer 7

the proportion of the data that belongs to a given class

Question 8

Cumulative Frequency Distribution

Answer 8

shows the NUMBER of items that are less than or equal to the upper class limit of each interval

Question 9

Cumulative Relative Frequency Distribution

Answer 9

shows the PROPORTION of items that are less than or equal to the upper limit of each interval

Question 10

Class Midpoint

Answer 10

the midpoint of a class interval

The representative value for each class in group statistics calculations