A gasoline distributor wonders whether an individual's income levels influences the grade of gasoline purchased. The null hypothesis is ___.
A)"income" is independent of "type of gasoline"
B)"income" influences "type of gasoline"
C)"income" is not independent of "type of gasoline"
D)"income" is related to "type of gasoline"
E)"regular" is independent of "premium"

Question

A gasoline distributor wonders whether an individual's income levels influences the grade of gasoline purchased.  The null hypothesis is ___.
A)"income" is independent of "type of gasoline" 
B)"income" influences "type of gasoline" 
C)"income" is not independent of "type of gasoline" 
D)"income" is related to "type of gasoline" 
E)"regular" is independent of "premium"

Quizplus · Accepted Answer

The null hypothesis states that there is no relationship or influence between an individual's income levels and the grade of gasoline purchased. Therefore, choice A, "income" is independent of "type of gasoline," is the best choice.

A Gasoline Distributor Wonders Whether an Individual's Income Levels Influences