Chapter 1 and 2

Question 1

Categorical/ Qualitative

Answer 1

uses descriptive terms to measure or classify something of interest
Nominal or Ordinal
-gender
-year level
-student ID #

Question 2

Numerical/ Quantitative

Answer 2

uses numerical values to describe something of interest
Interval or Ratio
-weight
-height
-price
-# of people

Question 3

Nominal

Answer 3

can only give data names and categorize them, cannot rank data

• state
• zipcode
• major
• gender

Question 4

Ordinal

Answer 4

can rank- order the values from lowest to highest, cannot make measurements between the two

• level of education
• year level
• satisfaction rating
• letter grade

Question 5

Interval

Answer 5

strictly numeric data with no true zero point and twice as much rule does not apply

• temperature
• year of birth
• gpa

Question 6

Ratio

Answer 6

has a true zero point

• age
• height/weight
• price
• salary

Question 7

Descriptive Statistics

Answer 7

summarize and display data

Question 8

Inferential

Answer 8

allows us to make claims or conclusions about the data based on the sample

Question 9

population

Answer 9

all possible subjects of interest

Question 10

sample

Answer 10

subset of the population

Question 11

parameter

Answer 11

everything that is measured from the population

Question 12

statistic

Answer 12

everything that is measured from the sample

Question 13

Displaying Categorical data

Answer 13

pie chart

bar graph

Question 14

Displaying Numerical data

Answer 14

frequency distribution table

Question 15

Boxplot

Answer 15

five number summary plot(Q1, Q2, Q3, Max, Min)

Question 16

Scatter Plot

Answer 16

provides a picture of the relationship between two numerical variables

Question 17

Histogram

Answer 17

a bar graph showing the number of observations in each class as the height of each bar