Frequency Table Essay

Frequency Table

Frequency table refers to table that shows the number of times an item occur. According to Lind, Marchal, & Wathen, (2015), a frequency table refers to the grouping of the qualitative data into mutually exclusive and collectively exhaustive classes demonstrating the number of observations in each class.

Two Numerical ways of describing Quantitative Variables

The two numerical ways to describe the quantitative variables are

1. Measure of Location

2. Measure of Dispersion

Measure of Location

Measure of location helps to report a typical value in the set of observations. The five measure of location are:

1. Arithmetic Mean

Arithmetic mean is calculated by adding all the values in the data set then dividing it with the number

Geometric Mean

Geometric mean refers to the arithmetic mean of the values which are taken on a log scale. Mathematically,

Geometric Mean = n√(x1……xn) or n√(final value / initial value)

For example: the total number of female enrolled in Padmokanya College increased from 5,00,000 in 1996 to 750,000 in 2006.

Now,

The geometric mean rate of increase over the ten years is,

GM = 10√750000/500000

Measure of Dispersion

Measure of dispersion helps to give information regarding the spread of the variable’s value in a set of observations. The measure of dispersions is mentioned in the following headings:

1. Range

Range is the difference between minimum and maximum value in the set of data.

Range = Maximum Value – Minimum Value

For example: the salaries of five randomly selected people of Kathmandu are $10,000, $15,000, $15,000, $20,000 and $25,000.

Now,

Range = Maximum Value – Minimum Value = $25,000 - $10,000 = $15,000

2. Variance

Variance is another measure of dispersion that measures the degree of spread in the variable’s value. Mathematically,

Variance = ∑(x - µ)2 /