Frequency Distributions

Question 1

Frequency distribution (also called a one-way table) is a

Answer 1

tabular display of data constructed either by counting the observations of a variable by distinct values or groups or by tallying the values of a numerical variable into a set of numerically ordered bins.

Question 2

Absolute frequency is

Answer 2

the actual number of observations counted for each unique value of the variable (also called raw frequency).

Question 3

Relative frequency (%) is

Answer 3

the absolute frequency of each unique value of the variable divided by the total number of observations of the variable.

Question 4

Cumulative absolute frequency…

Answer 4

cumulates (i.e., adds up) in a frequency distribution the absolute frequencies as one moves from the first bin to the last bin.

Question 5

Relative absolute frequency is a

Answer 5

sequence of partial sums of the relative frequencies in a frequency distribution.

Question 6

How to calculate the Number of bins (k)?

Answer 6

Calculate the number of bins by taking the square root of the number of data points and round up.

Question 7

For easier interpretation…

Answer 7

start the first bin at the nearest whole number below the minimum value.