— is used in quality control 

(a) Mean 

(b) Median 

(c) Range 

(d) Quartiles

Short cut method for calculating arithmatic mean also known as

a. assumed average method 

b. Assumed variable method 

c. Assumed mean method 

d. All of these

Fisher’s formula satisfies —- test 

(a) Unit test 

(b) Time reversal Test 

(c) factor Reversal test 

(d) All

What is the relation between mean, mode, median.

When the distribution is of open end classes which average may appropriate 

(a) Mean

(b) Median 

(c) Mode 

(d) None  

Which divides the value of a variable into two equal parts? 

(a) Median

(b) Mean 

(c) Mode 

(d) All these

 In Laspear’s Index number —- year quantities are used 

 (a) Base 

(b) Current 

(c) Average 

(d) None

Moments are used to find a measure of 

(a) Central tendency 

(b) Dispersion 

(c) Skewness 

(d) All these