Question

Asked Jul 15, 2019

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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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