# Make a frequency table, a pie chart, and a bar plot for the following data for patients' blood types. A B A A B AB O A B AB O A A A B B B B AB O O O B AB O AB O B AB O A B

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Make a frequency table, a pie chart, and a bar plot for the following data for patients' blood types.

A B A A B AB O A B AB O A A A B B B B AB O O O B AB O AB O B AB O A B

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Step 1

Frequency distribution:

The number of times each value of X repeats is the frequency of that particular event. Frequencies will be calculated by using the tally mark.

Discrete random variable:

If the variable X takes finite or countable values, then the variable X is said to be discrete.

Conditions to construct a discrete frequency distribution:

• The number times a specified value of X repeats is the frequency of that particular value of
• The sum of frequencies of all the values of X must be equal to total number of observations.
• The probabilities of all the values of the variable X must lie between 0 and 1.
Step 2

Construct the frequency distribution for the data of patient’s blood type.

Consider that the variable X represents the patient’s blood type.

Here, the variable X takes the values A, B, AB and O.

Here, A is a blood type , and A is repeated 7 times in the dataset.

Therefore, the frequency of the blood type A is 3.

Similarly, the frequencies of all the remaining blood types have to be calculated.

The frequency distribution table for the data of patient’s blood type is obtained below:

Step 3

Construct a pie chat for the data of patient’s blood type.

Here, EXCEL software is used to construct pie chart.

Software procedure:

Step-by-step procedure to draw the pie chart using EXCEL software:

• In Excel sheet, enter X = Patient’s blood type in one column and Percentage in another column.
• Select the data and then choose Insert > Cha...

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