931. The harmonic mean of 3,4 and 8 is
A.3.43
B.3
C.4
D.8

932. The geometric mean of 2,4 and 8 is
A.3
B.5
C.2
D.4

933. Value of [(n +1)⁄2]th term is the formula of
A.2nd quartile
B.median
C.1st quartile
D.both A and B

934. A many sided closed figure used in frequency distribution is termed as
A.frequency polygon
B.frequency hexagon
C.frequency pentagon
D.frequency decagon

935. By adding all numbers in the set together and then total is divided by the number of scores in that set, we obtained
A.geometric mean
B.arithmetic mean
C.standard deviation
D.variance

936. The total number of observations , which are below a certain value are known as
A.class boundaries
B.class marks
C.cumulative frequency
D.variances

937. The most frequent observation in a data set is called
A.mode
B.median
C.range
D.mean

938. Frequency polygon is constructed by plotting frequencies against their
A.standard deviations
B.class marks
C.variances
D.means

939. The range in the data 18, 25, 12, 13, 8, 9, 20 is equal to
A.11
B.33
C.13
D.17

940. The summary statistics which measure the middle or center of the data are called
A.logarithms
B.measures of central tendency
C.measures of dispersion
D.proportions