ECAT Pre General Science Statistics Online Test With Answers

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ECAT Pre General Science Statistics Online Test

Sr. # Questions Answers Choice
1 The measures of dispersion are changed by a change of Origin Scale Algebraic sign None of these
2 The first moment about mean is equal to Mean Zero Median Mode
3 Lack of symmetry is called Dispersion Moment Skewness Kurtosis
4 Mean deviation about the median is Maximum Minimum zero 1
5 The co-efficient of variation is also called Mean deviation Quartile deviation Standard deviation Relative deviation
6 The positive square root of the variance is refered to as the Mean deviation Quartile deviation Standard deviation Range
7 Mean deviation is always Greater than S.D Less than S.D Equal to S.D Negative
8 Sum of absolute deviations are minimum if computed from Mean Median Mode Range
9 Relative measures have no Negative values Decimal values Units Value
10 The most common measures of absolute variability are also called Range Measures of spread Relative measures Mean deviation
11 __________ is always greater than or equal to zero Range Standard deviation Mean deviation Variance
12 The mean of the absolute deviations between the values and their median is called Population Standard deviation Range Mean deviation
13 The difference between the highest and lowest values in a population is called Range Variance Mean deviation Standard deviation
14 A symmetrical distribution has mean equal to 4. Its mode will be Less than 4 Equal to 4 Greater than 4 None of these
15 If any value is zero, then it is impossible to calculate H.M Median A.M None of these
16 In symmetrical distribution, mean, median and mode are Equal Different Zero None of these
17 A.M is _______ affected by extreme values Not Highly Less None of these
18 The most frequent value in a data set is called Mean Median Mode Quartile
19 If any value in the data set is zero, then it is not possible to compute H.M A.M Median Mode
20 G.M becomes zero if any of the observation is zero 1 similar Opposite
21 Geometric mean of 0, 5, 1, 4, 8 is 8 5 2 1
22 The sum of squares of the deviations of the observation from their mean is Minimum Maximum Zero One
23 Mean is highly affected by Even values Odd values Zero values Extreme value
24 The sum of deviations of the value from the mean is always Minimum Maximum One zero
25 A central value is also called Central tendency Variability Population Parameter
26 Sample mean is a Constant Parameter Variable Statistic
27 In tabulation, row captions are also called Stub Box-head Body None of these
28 In tabulation, column captions are also called Box-head Body Stub None of these
29 Graph of time series is called Sector diagram Ogive Historigram None of these
30 Frequency polygon is a Line graph Bar graph Circular graph Rectangle graph
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