1 The monthly salaries of a sample of 100 employees were rou

1. The monthly salaries of a sample of 100 employees were rounded to the nearest $10. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?

The monthly salaries of a sample of 100 employees were rounded to the nearest $10. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?

?$150

?$200

?$100

?$50

2.

For a chi-square test involving a contingency table, suppose the null hypothesis is rejected. We conclude that the two variables are __________.

?related

?linear

?not related

?curvilinear

Solution

SOLUTION:

1.Ans.100

The difference between the low and the high is $680. If we want to divide that difference into seven classes, $680/7 is close to $100. An interval of $100 would make the most sense here.

2..For a chi -square test involving a contingency table, the test hypothesis is

Ho: unrelated (null hypothesis)

Ha: related (alternative hypothesis)

since the null hypothesis is the reject we accept related

Ans:RELATED