Regression coefficient of x on y will be:
A. σ x σ y
B. r ( σ y σ x ) 2
C. r ( σ x σ y ) 2
D. r σ y σ x
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The formula to find the mid point of a class is
A. L 1 + L 2
B. L 1 − L 2
C. 2 L 1 + L 2
D. 2 L 1 − L 2
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How will the arithmetic mean be affected by adding a constant 'b' to every item?
A. X + b
B. X − b
C. b X
D. None of these
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When the population mean is either lower or higher than some hypothesised value . . . . . . . . Is considered to be appropriate.
A. one tailed test
B. two tailed test
C. Both A and B
D. None of these
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If the Karl Pearson coefficient of correlation between x and y is 0.3, then the coefficient of correlation between -x and 2y is
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'Statistics is the science of Counting.' Whose statement is this?
A. Bowley
B. King
C. Seligman
D. None of these
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Which of these reports provide information without any evaluation?
A. Informational
B. Interpretative
C. Routine
D. Progress
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Which one of the following is not a formula of standard deviation ( σ ) ?
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If one regression coefficient is greater than one, then other will be:
A. More than one
B. Equal to one
C. Less than one
D. Equal to minus one
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When there is either perfect positive correlation and either perfect negative correlation between the two variables the two regression lines will . . . . . . . .
A. overlap
B. coincide
C. Both A and B
D. None of these
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Which series is more suitable to represent by diagram?
A. Individual series
B. Discrete series
C. Continuous series
D. None of these
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There is a very high inverse relationship between measures of 'Overweight' and 'life expectancy'. Which one of the following value of the coefficient of correlation is consistent with the statement?
A. 0.80
B. 0.20
C. -0.20
D. -0.80
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A research paper is a brief report of research work based on:
A. Primary Data only
B. Secondary Data only
C. Both Primary and Secondary Data
D. None of the above
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Which one of these variables is a binomial random variable?
A. time it takes a randomly selected student to complete a multiple-choice exam
B. number of textbooks a randomly selected student bought this term
C. number of women taller than 68 inches in a random sample of 5 women
D. number of CDs a randomly selectedperson owns
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'Number summary' is published in Uttar Pradesh:
A. Monthly
B. Quarterly
C. Yearly
D. Weekly
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Which one of the following objectives is not the objective of secondary data collection?
A. Identity the problem
B. Test the hypotheses of the relevant present problem
C. Better define the problem
D. Interpret primary data more insightfully
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In a Binomial Distribution, if p = g, then P(X = x) is given by:
A. n C x ( 0.5 ) n
B. n C n ( 0.5 ) n
C. n C x p ( n − x )
D. n C n p ( n − x )
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If mean = 25, median = 30 and standard deviation = 15, the distribution will be:
A. Symmetrical
B. Positively skewed
C. Negatively skewed
D. Normal
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Which one of the following is a relative measure of dispersion?
A. Mean deviation
B. Standard deviation
C. Coefficient of variation
D. Variance
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The sum of absolute deviations is minimum if these deviations are taken from the:
A. Mean
B. Mode
C. Median
D. Upper quartile
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