- A researcher wanted to know if a particular brand was preferred by different age groups. The researcher observed the data below. Is there a
relationship between age and brand?
Brand A Brand B Brand C
Under 30 120 130 110
30 – 50 77 127 140
50 and older 84 100 98
a. Which test are you using?
b. What are your H0 (null hypothesis) and Ha (alternative hypothesis)?
c. Calculate your statistic.
d. What decision does this inform you to make and why? (You may use the critical value in the chart or the calculated p-value, but you must indicate what
you are doing.)
e. Write a one to two sentence conclusion that correctly responds to the question.