Exam #1 (Ch.1-3 & 12)

Question 1

Categorical (Qualitative) Variable

Answer 1

Descriptive

“Quales” (Which ones?)

Ex: “Yes/No,” “Blue/Red/Brown”
Marital Status, Political Party, Eye Color

Question 2

Numerical (Quantitative) Variable

Answer 2

“Quantas” (How many? How much? How often?)

Ex: “1, 2, 3, or 10”

Question 3

Numerical:

“Discrete” Variable

Answer 3

“Counting” Process

Ex: “1, 2, 3, 4, 5”

Number of Cats, number of children, defects per hour

Question 4

Numerical:

“Continuous” Variable

Answer 4

“Measuring” Process

Ex: “5.6 or 2.489”

Temperature, weight, voltage

Question 5

Ex: Categorical or Numerical(Dis/Cont)?

“How many text messages
have you sent in the past
three days?”

Answer 5

Numerical
(discrete)

Question 6

Ex: Categorical or Numerical(Dis/Cont)?

“How long did the mobile
app update take to
download?”

Answer 6

Numerical
(Continuous)

Question 7

Ex: Categorical or Numerical(Dis/Cont)?

“Do you have a Facebook
profile?”

Answer 7

Categorical
(Qualitative)

Question 8

Ex: Variable Type

1. Major
2. Class Letter Grade
3. Cumulative Grade Point Average
4. Number of times Uche says “ok” in class
5. Which social media platform do you use the most?

Answer 8

1. Categ. “Qualitative”
2. Categ. “Qualitative”
3. Num. “Quantitative” (Discrete)
4. Num. “Quantitative” (Discrete)
5. Categ. “Qualitative”

Question 9

Primary Sources

Answer 9

The data collector is the one using the data for analysis

Ex: Data from a political survey, data collected from an experiment, observed data

Question 10

Secondary Sources

Answer 10

The person performing data analysis is not the data collector

Ex: Analyzing census data, examining data from print journals or data published on the internet

Question 11

Population:

Answer 11

consists of all the items or individuals
about which you want to draw a conclusion. The
population is the “large group

Question 12

Sample:

Answer 12

is the portion of a population selected for
analysis. The sample is the “small group”

Question 13

Categorical Data (Tallying Data)

Answer 13

Includes:

-One Categorical Variable (Summary Table)
&
-Two Categorical Variables (Contingency Table)

Question 14

Summary Table:

Answer 14

tallies the values as frequencies or percentages for each category.

helps you see the differences among
the categories by displaying the frequency, amount, or percentage of
items in a set of categories in a separate column.

Question 15

Contingency Table:

Answer 15

helps organize two or more
categorical variables

Question 16

Numerical Data:

Answer 16

Ordered Array

Frequency Distributions

Cumulative Distributions

Question 17

Ordered Array:

Answer 17

is a sequence of data, in rank order, from the smallest
value to the largest value.

Question 18

Frequency Distribution:

Answer 18

is a summary table in which the
data are arranged into numerically ordered classes