**921. A bar chart constructed in which the area of each bar is proportional to the number of items in each group is known as**

A.pi chart**B.histogram**

C.frequency distribution table

D.polygon

**922. 1st quartile is also known as****A.lower quartile**

B.upper quartile

C.median

D.geometric mean

**923. Value of [3(n +1)⁄4]th term is the formula of**

A.variance**B.3rd quartile**

C.2nd quartile

D.geometric mean

**924. The square of the standard deviation is called**

A.harmonic mean**B.variance**

C.mode

D.2nd quartile

**925. In the set 2, 4, 5, 4, 6, 5, 3, 4, 2, the mode is**

A.2

B.5**C.4**

D.3

**926. When the cumulative frequencies are plotted against the end points of their respective class intervals and joined together, the resultant graph is called**

A.cumulative frequency pentagon

B.cumulative frequency histogram

C.cumulative frequency hexagon**D.cumulative frequency polygon**

**927. The table which shows the frequency of each score is called a**

A.polygon

B.pi chart

C.histogram**D. frequency distribution table**

**928. 3rd quartile is also known as**

A.lower quartile**B.upper quartile**

C.median

D.geometric mean

**929. The monthly income of 5 persons are 3000, 5000, 4000, 2000 and 6000. Their arithmetic mean should be****A.4000**

B.6000

C.5000

D.3500

**930. The positive square root of the mean of the squared deviations of the values from their mean is known as****A.standard deviation**

B.median

C.variance

D.harmonic mean