Lecture 2.1 - Describing Categorical Data - Frequency distributions

Question 1

Frequency Distributions

Answer 1

1. Freq. distribution: listing of distinct values and their frequencies for qualitative data.
2. Each row of freq. table lists a category and its count.

Question 2

Construct a frequency distribution

Answer 2

1. Create a frequency table by listing the distinct values of the observations in the first column.
2. Use tally marks to represent the frequency of each distinct value in the second column.
3. Count the tally marks and record the total frequency in the third column.

Question 3

Freqency table in a google sheet

Answer 3

1. Select data to visualize.
2. Click on Data option in the formatting bar.
3. Select Pivot Table and create a new sheet.
4. In Pivot Table Editor, add rows and values.

Question 4

Relative Frequency

Answer 4

1. Relative frequency = frequency / total number of observations.
2. To calculate, obtain a frequency distribution and divide each frequency by the total number of observations.