Statistics salkind 4e test bank ch20

Chapter 20: (Mini) Data Mining: An Introduction to Getting the Most Out of Your
BIG Data
Test Bank
MULTIPLE CHOICE
1. These days, information is measured in _______, or about 1 quintillion bytes.
a. Megabytes
b. Exabytes
c. Kilobytes
d. Gigabytes
ANS: B
PTS: 1
DIF: Easy
REF: An Introduction to Getting the Most Out of Your BIG Data
OBJ: What is data mining all about?
COG: Knowledge
2. Looking for patterns in a large data sets is also referred to as _______.
a. Data mining
b. Data uncovering
c. Data cleaning
d. Data questing
ANS: A
PTS: 1
DIF: Easy
REF: An Introduction to Getting the Most Out of Your BIG Data
OBJ: What is data mining all about?
COG: Knowledge
3. If you created cross-tabulation tables, your tables would summarize _______ data.
a. Reliable
b. Ratio
c. Categorical
d. Ordinal

ANS: C
PTS: 1
OBJ: What is data mining all about?

DIF: Easy
REF: Creating a Pivot Table
COG: Comprehension

4. A pivot table will allow you to visualize and manipulate rows and columns, as well as the

_______ of cells.
a. Relevance
b. Reliability values
c. Validity figures
d. Contents
ANS: D
PTS: 1
OBJ: What is data mining all about?

DIF: Medium
COG: Knowledge

REF: Creating a Pivot Table


TRUE/FALSE
1. DAVERAGE is an Excel function that computes the average within a specified field in which

certain conditions are met.
ANS: T

PTS: 1
OBJ: What is data mining all about?

DIF: Medium
COG: Knowledge

REF: What DAVERAGE Does

2. COUNTIF is an Excel function that counts the number of cells on a range of cells that meet

no criteria.
ANS: F
PTS: 1
OBJ: What is data mining all about?

DIF: Medium
REF: What COUNTIF Does
COG: Comprehension

SHORT ANSWER
1. What is an example of a research situation in which you would use data-mining techniques?
ANS:

Example: I would like to find social media posting patterns of 500,000 social media users.
PTS: 1
DIF: Medium
OBJ: What is data mining all about?

REF: Creating a Pivot Table
COG: Application