Car Example In 1986, two research groups sampled consumers on the driving perfor

Question

Car Example In 1986, two research groups sampled consumers on the driving performances of the Dodge Colt versus the Plymouth Champ in a blind road test: that is the consumer did not know if they were driving the Colt or the Champ. However, these cars were identical and only their marketing varied. One research group (A) sampled 66 consumers each day for 60 days (a large number of days to control for weather and other variables), while the other research group (B) sampled 22 consumers each day for 50 days. Which consumer group observed more days in which 60% or more of the consumers tested preferred the Dodge Colt: Group A Group B Why? What was your reason for picking your answer?

Explanation / Answer

Group A consumer group observed more days in which 60% or more of the consumers tested preferred the Dodge Colt.

We can say this because Group A was sampled for over 30 consumers (i.e, 66 consumers). This sample size is large enough for the data to produce a statistically significant result. Whereas in Group B sample size is not large enough(n<30) to produce data that is statistically significant.

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