Question

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

$df=----$

Short answer

$df=3$

Step-by-step solution

Given Information

Given tables are

we have to determine the degree of freedom.

Explanation

The formula of degree of freedom is

$df=n-1$

where $\left(n\right)$is number of cells

$$\begin{gathered} df=n-1 \\ =4-1 \\ =3 \end{gathered}$$