A large corporation is interested in determining whether a r

A large corporation is interested in determining whether a relationship exists between the commuting time of its employees and the level of stress-related problems observed on the job. A study of 120 workers reveals the data in the accompanying table. Complete parts (a) and (b) below.

Use the table of critical values for chi-square distributions.

a. At the 0.01 level of significance, is there evidence of a relationship between commuting time and stress level?

State the null and alternative hypotheses to test.

H0:___

H1:___

B. Find the test statistic.

chi Subscript STAT Superscript 22STATequals=nothing

(Round to two decimal places as needed.)

Do we reject ?

Look up the critical value for a chi-square distribution with 4 degrees of freedom and an upper tail of a=.05.

Do we reject?

Solution