Hypothesis Testing for Mean Difference
Not what you're looking for?
P 21
A market research firm used a sample of individuals to SELFIII rate the purchase potential of a
particular product before and after the individuals saw a new television commercial about
the product. The purchase potential ratings were based on a 0 to 10 scale, with higher values
indicating a higher purchase potential. The null hypothesis stated that the mean rating
"after" would be less than or equal to the mean rating "before." Rejection of this hypothesis
would show that the commercial improved the mean purchase potential rating. Use
a = .05 and the following data to test the hypothesis and comment on the value of the
commercial.
Purchas Rating Purchase Rating
Individual After Before Individual After Before
1 6 5 5 3 5
2 6 4 6 9 8
3 7 7 7 7 5
4 4 3 8 6 6
Purchase this Solution
Solution Summary
The solution gives detailed steps of hypothesis testing on mean difference using the example of market research firm. All formula and calculations are shown. Finally, conclusion is stated clearly.
Solution Preview
Let me list a table for the data
X1 X2 d d*d
5 6 -1 1
4 6 -2 4
7 7 0 ...
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.