Nominal Data

Question 1

cross-classification table is used to…

Answer 1

describe the relationship between two nominal variables.

Question 2

Frequency distribution refers to..

Answer 2

a table that presents the categories and their counts.

Question 3

How do you find the cumulative distribution function of a class?

Answer 3

add the frequency of that class with the frequencies of all previous/lower classes.

Question 4

relative frequency distribution refers to…

Answer 4

a table with categories and their proportion of total count.

Question 5

What are the modalities of histograms?

Answer 5

unimodal histogram - single peak

bimodal histogram - two peaks

Question 6

What are the cumulative distribution function?

Answer 6

A CDF of a particular class is the proportion of measurements that are less than the upper limit of that class.

Question 7

What’s a modal class?

Answer 7

the class with the largest number of observations.

Question 8

When should relative frequencies be used?

Answer 8

When comparing two or more histograms, each with different numbers of observations.