Chapter 4: Exploratory Data Analysis

Question 1

____ are pieces of information about individuals organized into variables.

Answer 1

Data

Question 2

A particular characteristic of the individual is

Answer 2

variable

Question 3

example of variable and individuals

Answer 3

Medical Records as individuals are patients and gender, age, weight, etc. is the variable

Question 4

_____ take category or label values and place an individual into one of several groups.

Answer 4

Categorical variables

Question 5

______ take numerical values and represent some kind of measurement.

Answer 5

Quantitative variables

Question 6

what helps to summarize obtained numerical data?

Answer 6

a graphical display

Question 7

_____ pie chart or bar chart, supplemented by

Answer 7

Graphical display

Question 8

_______ category counts and percentages

Answer 8

Numerical summaries

Question 9

at least means

Answer 9

no less than this number
Ex: people that eat at least 4 servings mean all the people that eat 4 servings or more

Question 10

Shape
Center
Spread

are examples of

Answer 10

overall pattern

Question 11

outliers are examples of

Answer 11

deviations from the patter

Question 12

Symmetry / Skewness
Peakedness (the # of peaks)

describe what?

Answer 12

Shape

Question 13

Single peak = unimodal
double peaked = bimodal
uniform distribution = uniform

are examples of what?

Answer 13

Symmetric distribution

Question 14

if a distribution has more than two modes it a ____

Answer 14

multimodal distribution

Question 15

true or false:

“The center of the distribution is its midpoint.”

Answer 15

TRUE