Question

Do private practice doctors and hospital doctors have the same distribution of working hours? Suppose that a sample of 100 private practice doctors and 150 hospital doctors are selected at random and asked about the number of hours a week they work. The results are shown in Table

$df=\_\_\_\_\_\_\_.$

Short answer

$df=3$

Step-by-step solution

Given information

The given data is

Explanation

From the given table

The degree of freedom is calculated using the formula $df=$number of columns$-1$.

The number of columns is $4$in this case.

$df=numberofcolumn-1$

localid="1654169143324" $$\begin{gathered} =4-1 \\ =3 \end{gathered}$$