A recent study was conducted to determine if any of three suppliers of electronic components has a different median delivery time on special orders.To test this,five orders were given to each supplier and the delivery days were recorded.These data are shown as follows:
If a Kruskal-Wallis test is to be performed,the number of degrees of freedom for determining the critical value is 2.

Question

A recent study was conducted to determine if any of three suppliers of electronic components has a different median delivery time on special orders.To test this,five orders were given to each supplier and the delivery days were recorded.These data are shown as follows:
  If a Kruskal-Wallis test is to be performed,the number of degrees of freedom for determining the critical value is 2.

Quizplus · Accepted Answer

The Kruskal-Wallis test is a non-parametric test used to compare three or more independent samples. The number of degrees of freedom is equal to the number of groups minus one. In this case, there are three groups or suppliers, so the degrees of freedom would be 3-1=2. Therefore, the statement is true.

A Recent Study Was Conducted to Determine If Any of Three