A market researcher conducted a study to see if different age groups prefer different news sources. He surveyed 80 people in the 25-49 age group and 80 people in the 50+ age group and asked them if they prefer to get their news from TV, online, radio, or printed newspapers. The data are listed in the table below. Conduct a Chi-Square test for Independence with = .01.

What are the variables in this test? What type of variables are they?

a. Age group: ordinal

Preferred news source: continuous

b. Age group: nominal

Preferred news source: nominal

c. Age group: continuous

Preferred news source: continuous

d. Age group: nominal

Preferred news source: continuous

Select the correct written null and alternative hypotheses.

a. Null: News source preference is not different between younger adults and older adults.

Alternative: News source preference is different between younger adults and older adults.

b. Null: News source preference is different between younger adults and older adults.

Alternative: News source preference is not different between younger adults and older adults.

c. Null: Younger adults are not significantly different than older adults.

Alternative: Younger adults are significantly different than older adults.

d. Null: Younger adults are significantly different than older adults.

Alternative: Younger adults are not significantly different than older adults.

News source	Group 18-49	Group 50+	Total count
TV	20	30	50
Online	40	20	60
Radio	15	15	30
Printed papers	5	15	20