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A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27

The actual distribution for a class of 20 is in table 11.28

Determine P value.

Short Answer

Expert verified

P value is0.56

Step by step solution

01

Given Information  

Given tables are

we have to find P value

02

Explanation  

We know that there are1000total frequencies. As a result, we multiply each frequency by 1000and calculate the table below.

The following steps will be used to calculate the χ2test statistic.

1. In the first column of the excel sheet, we write the expected frequencies.

2. Fill in the first column of the excel sheet with the observed frequencies.

3. Create a column titled (Observed - Expected)

4. Create a new column to calculate the square of the result (Observed Expected)

5. Divide the square of (Observed - Predicted) by the expected frequencies of each observation in the last column.

6. Finally, we add the last two columns together.

Let's now perform the calculation in Excel as follows:

The P value can be computed in excel as shown below:

The P value is≈0.56

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