Variance, standard deviation, range and their applications - Jamb Economics Past Questions and Answers

Question 6:

• JAMB 2004

A large standard deviation is an indication of

A. The size of the sample
B. A wide spread around the mean
C. A wide difference between the mean and the mode
D. The difference between the highest and the lowest values

Question 7:

• JAMB 2006

The range of the data 14,13,15,18,20,35 and 13 is

A. 20
B. 22
C. 13
D. 18

Question 8:

• JAMB 2007

The range is used to

A. Estimate the mean from grouped data
B. Calculate the standard deviation
C. Determine the spread of a set of data
D. Measure the difference between the mean and the mode

Question 9:

• JAMB 2008

If the standard deviation of a given data is 8.2, find its variance

A. 4.1
B. 67.2
C. 82.0
D. 91.8

Question 10:

• JAMB 2010

The standard deviation of a set of data is

A. Always measured from the mode
B. The most representative of averages
C. Always measured from the median
D. A measure of dispersion