1051. SSE can never be _____________
A. larger than SST
B. smaller than SST
C. equal to 1
D. equal to zero
✅ The correct answer is option A.
UPSC
1052. The relationship between number of beers consumed (x) and blood alcohol content (y) was studied in 16 male college students by using least squares regression. The following regression equation was obtained from this study: != -0.0127 + 0.0180x The above equation implies that__________
A. each beer consumed increases blood alcohol by 1.27%
B. on average it takes 1.8 beers to increase blood alcohol content by 1%
C. each beer consumed increases blood alcohol by an average of amount of 1.8%
D. each beer consumed increases blood alcohol by exactly 0.018
✅ The correct answer is option C.
1053. If the coefficient of determination is equal to 1, then the correlation coefficient _______
A. must also be equal to 1
B. can be either -1 or +1
C. can be any value between -1 to +1
D. must be -1
✅ The correct answer is option B.
1054. In regression, the equation that describes how the response variable (y) is related to the explanatory variable (x) is___________
A. the correlation model
B. the regression model
C. used to compute the correlation coefficient
D. None of these alternatives is correct.
✅ The correct answer is option B.
1055. If two variables, x and y, have a very strong linear relationship, then ____________
A. there is evidence that x causes a change in y
B. there is evidence that y causes a change in x
C. there might not be any causal relationship between x and y
D. None of these alternatives is correct.
✅ The correct answer is option C.
1056. If there is a very strong correlation between two variables then the correlation coefficient must be _______
A. any value larger than 1
B. much smaller than 0, if the correlation is negative
C. much larger than 0, regardless of whether the correlation is negative or positive
D. None of these alternatives is correct.
✅ The correct answer is option B.
1057. Which of the following measurement scales is required for the valid calculation of Karl Pearson’s correlation coefficient?__________
A. Ordinal
B. Interval
C. Ratio
D. Nominal
✅ The correct answer is option A.
1058. Perfect correlation is one Perfect correlation is one in which_________
A. Area of a circle is in definite constant relationship with radius
B. When area of the circle is ½ radius
C. None of these
D. All of these
✅ The correct answer is option C.
1059. The variables whose calculation is done according to the weight, height and length and weight are known as__________
A. Flowchart Variables
B. Discrete Variables
C. Continuous Variables
D. Measuring Variables
✅ The correct answer is option C.
1060. If there exists any relation between the sets of variables, it is called__________
A. Regression
B. Skewness
C. Correlation
D. All of these
✅ The correct answer is option C.