2. A major university would like to improve its tarnished image following a large on-campus scandal. Its marketing department develops a short television commercial and tests it on a sample of n = 7 subjects. People's attitudes about the university are measured with a short questionnaire both before and after viewing the commercial. The data are as follows: Person X1 (Before) X2 (After) A 15 15 B 11 13 C 10 18 D 11 12 E 14 16 F 10 10 G 11 19 H 10 20 I 12 13 J 15 18 (b) Conduct a hypothesis test (showing all the steps) to determine if the university should spend money to air the commercial (i.e., did the commercial improve the attitudes?) Assume an alpha level = 0.05. You may use SPSS but not required.(a) Is this a within-subjects or a matched samples design? Explain your answer.
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
2. A major university would like to improve its tarnished image following a large on-campus scandal. Its marketing department develops a short television commercial and tests it on a sample of n = 7 subjects. People's attitudes about the university are measured with a short questionnaire both before and after viewing the commercial. The data are as follows:
Person X1 (Before) X2 (After)
A 15 15
B 11 13
C 10 18
D 11 12
E 14 16
F 10 10
G 11 19
H 10 20
I 12 13
J 15 18
(b) Conduct a hypothesis test (showing all the steps) to determine if the university should spend money to air the commercial (i.e., did the commercial improve the attitudes?) Assume an alpha level = 0.05. You may use SPSS but not required.(a) Is this a within-subjects or a matched samples design? Explain your answer.
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