It is believed that the effects of smoking differ depending on race. The following table gives the results of a statistical study for this question.
|
Number in the Average number of Number of lung study cigarettes per day cancer cases
|
|
Whites
|
400
|
15
|
78
|
|
AfricanAmericans
|
280
|
15
|
70
|
Do the data indicate that African Americans are more likely to develop lung cancer due to smoking? Use α = 0.05.