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# MCQs: Correlation and Regression

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Please see attached and calculate summary output to answer the following questions:
1/ If the correlation between 2 variables is -.77 which is true.
a/ There is a fairly strong negative linear relationship
b/ An increase in one variable will cause the other variable to decline by 77%

2/Calculate the correlation coefficient between rain on Friday and rain on Saturday variables. which statement is true?
a/ Chance of rain on Saturday is 80%
b/ Correlation coefficient is 21%
c/ Correlation is not statistically significant at 5%level

3/ in order to develop a regression model to predict Saturday attendance
a/ It is impossible to distinguish dependent and independent variables
b/ Friday attendance is independent and Saturday is dependent
c/ Both Friday and Saturday are dependent variables
d/ Both Friday and Saturday attendance is independent variables.

4/ Which is the correct interpretation of the regression slope coefficient for Friday attendance
a/ When attendance increase by 100 average Saturday attendance increase151
b/ When Friday attendance increase by 100 average Saturday attendance increase12.39
c/ When Friday attendance increase by 100 average Saturday attendance increase1513
d/ When Friday attendance increase by 100 average Saturday attendance increase15.13
e/ When Friday attendance increase by 100 average Saturday attendance increase1.51

5/ Which of the following is true
a/ The effect of Friday attendance and Saturday rain variables are statistically significant at 5% level.
b/ All the independent variables are statistically significant at 5% level
c/ The effect of Friday attendance variables is statistically significant at 5% level
d/ None of the independent variables are statistically significant at 5% level
e/ The effect of Friday attendance and the interaction variables are statistically significant at 5% level.

6/ If Friday attendance is 18,394 and is expected to rain on Saturday, the predicted Saturday attendance is approx.
a/ 14700
b/ 40300
c/ 17900
d/ 29100
e/19700.