ELEMENTS OF STATISTICS, SET 1

ELEMENTS OF STATISTICS

Q.1

The first step of summarizing the data is.

Ans. 

Classification.

Q.2

The measure of central tendency to be used to study average rate of change in population is.

Ans. 

Geometric Mean.

Q.3

To find the average size of shoes sold in the market we should use.

Ans. 

Mode.

Q.4

To find the average speed of a vehicle when same distance is covered with different speeds, the suitable measure is.

Ans. 

Harmonic mean.

Q.5

To find the average of quantity prices, the measure of central tendency to be used is.

Ans. 

Harmonic mean.

Q.6

What is the relationship among the correlation coefficient (r) and the two regression coefficient byx & byx ?

Ans. 

r²=bxy.byx.

Q.7

The regression coefficient lies between.

Ans. 

–∞ to +∞.

Q.8

The correlation coefficient lies between.

Ans. 

–1 to +1.

Q.9

For testing the independence of two attributes, the test used is.

Ans. 

X² test.

Q.10

Correlation of continuity in 2×2 contingency table should be used when expected frequency of any cell is.

Ans. 

Less than 5.

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