MCQs Statistics

Statistics

Which among the following statements is INCORRECT?

a.      Coefficient of correlation can be computed directly from the data without measuring deviation.

b.     Measures of Dispersion are also called averages of the second order.

c.      Standard deviation can be negative.

d.     Mean deviation can never be negative.

(Ans: c)

One of the methods to find out Mode is:

a.      Mode = 3 Median + 2 Mean

b.     Mode=3 Median – 3 Mean

c.      Mode = 2 Median – 3 Mean

d.     Mode=3 Median – 2 Mean

(Ans: d)

Which among the following statements is INCORRECT?

a.      Index number is a relative measurement.

b.     In fact all index numbers are weighted.

c.      Theoretically the best average in construction of index numbers is Geometric mean.

d.     It is not possible to shift the base if it is the case of fixed base index

(Ans: d)

Mean Deviation can be calculated from:

a.      Mean

b.     Median

c.      Mode

d.     Any of the above

(Ans: d)

Scatter diagram is used to study ___ in economic statistics.

a.      Variability in the series

b.     Nature of Correlation in the two series

c.      Regression

d.     Secular trend

(Ans: b)

Coefficient of Correlation (r) is significant, if:

a.      r > 5 times Probable Error

b.     r < 6 times Probable Error

c.      r > 6 times Probable Error

d.     r = 6 times Probable Error

(Ans: c)