The range of following set of observations : 2, 3, 5, 9, 8, 7, 6, 5, 7, 4, 3, is
11
7
5.5
6
The mean age of 50 persons was found to be 32 years. Later it was detected that the age 28 was wrongly noted as 35, the age 57 was wrongly noted as 30 and the age 60 was wrongly noted as 32. Then the correct mea age is ________.
28
33
31
32.4
The mean of the squares of first n natural numbers is
n2/2
1/8 n ( n + 1 )
1/6 n ( 2n +1 )
1/6 ( n + 1 ) ( 2n + 1 )
The AM of the series 1, 2, 4, 8 ..... 2n is ______.
G.M of 4, 5, 20, 25 is
8
9
10
The relationship between mean, median and mode for a moderately skewed distribution is
Mode = 3Median - 2 Mean
Mode = 2 Median - Mean
Mode = 3 Median - 2 Mean
Mode = 2 Median - 3 Mean
If the two lines of regression of a bivariate distribution coincide, then the correlation coefficient ρ satisfies?
ρ = 0
ρ > 0
ρ < 0
ρ = 1 or -1
In a moderately skewed distribution the value of mean and median are 5 and 6 respectively. Then the value of mode is _______.
16
21
Consider the following statements:Mode can be computed from histogramMedian is not independent of change of scaleVariance is independent of change of origin and scale Which of these is/are correct ?
Only ( a )
Only ( b
(a ) and ( b )
(a ), (b ) and ( c )
The temperature during a month in summer are recorded as ( in F ) 99, 78, 80, 94, 92, 76, 86, 96 . The mediantemperature is
76
99
92
89
