ECAT Pre General Science MCQ Test With Answer for Statistics Full Book

MCQ's Test For ECAT Pre General Science Statistics Online Test

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ECAT Pre General Science Statistics Online Test

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Question # 1

When choosing an estimator of a population parameter, one should consider

Question # 2

The attributes denoted by A, B, ................ are called

Question # 3

The difference between the highest and lowest values in a population is called

Question # 4

A set that contains no element is called

Question # 5

In normal probability distribution, all odd order moments about mean are

Question # 6

If all items are given equal weight, the index number is called

Question # 7

If the two regression coefficients are 0.8 and 0.2, then coefficient of correlation r is

Question # 8

The data which have not undergone any statistical treatment are ________ data

Question # 9

Random variable is also called

Question # 10

If r = 1 or -1, the regression lines are

Question # 11

A value calculated from sample is called

Question # 12

When a pair of dice is rolled, the sample space consists of

Question # 13

Statistical laws are true

Question # 14

Another name of the population is

Question # 15

The most common measures of absolute variability are also called

Question # 16

The point in time at which the selected number was measured is referred to as the

Question # 17

Geometric mean of 0, 5, 1, 4, 8 is

Question # 18

The first moment about mean is equal to

Question # 19

_______ is the chance variation in an observation.

Question # 20

Which of the following would likely be a trend component of a time series

Question # 21

The measures of dispersion are changed by a change of

Question # 22

A population consists of unlimited number of elementary units

Question # 23

The sum of probabilities of events of a sample space is always

Question # 24

The area under the probability density function is

Question # 25

The total area under normal curve is

Question # 26

The shape of binomial distribution depends upon the value of its

Question # 27

The difference between the upper and the lower class boundaries of a class is called

Question # 28

The degree of relationship between the two attributes is called

Question # 29

The graph of the time series is called

Question # 30

The heading for different rows are called

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Sr.# Question Answer
1 If r = 1 or -1, the regression lines are
A. Parallel
B. Inclined at the angle <
C. Perpendicular
D. None of these
2 The number of tally count for each value is its
A. Range
B. Frequency
C. Class boundaries
D. Class mark
3 1 GHz equals to
A. 1024 Hz
B. 104MHz
C. 102MHz
D. 1024 MHz
4 The unit of frequency is
A. Hertz
B. Bytes
C. Mega bytes
D. None of these
5 The positive square root of the variance is refered to as the
A. Mean deviation
B. Quartile deviation
C. Standard deviation
D. Range
6 Indices that involve a group of commodities are referred to as
A. Simple indices
B. Common indices
C. Aggregate indices
D. Relative indices
7 A.M is _______ affected by extreme values
A. Not
B. Highly
C. Less
D. None of these
8 A well defined collection of distinct objects is called
A. Probability
B. Chance
C. Element
D. A set
9 In tabulation, row captions are also called
A. Stub
B. Box-head
C. Body
D. None of these
10 The total area under normal curve is
A. Infinity
B. unity
C. zero
D. greater than one
11 If any value in the data set is zero, then it is not possible to compute
A. H.M
B. A.M
C. Median
D. Mode
12 A computer can execute
A. a flow chart
B. a program
C. an algorithm
D. all of the above
13 The difference between the highest and lowest values in a population is called
A. Range
B. Variance
C. Mean deviation
D. Standard deviation
14 The entries in different cells of columns and rows in a table are called
A. Body of the table
B. Captions
C. Stub
D. Prefatory notes
15 An estimator is always is
A. Constant
B. Variable
C. Parameter
D. Statistic
16 Exponential smoothing requires
A. Past values of the time series
B. Current values of the time series
C. Both past and current values of the time series
D. Estimation of a time trend regression
17 Time series analysis is used to analyze data
A. Over different time periods
B. Across different companies
C. Across different companies and across different time periods
D. That are qualitative
18 The point in time at which the selected number was measured is referred to as the
A. Index number
B. Base period
C. Relative price
D. Weighted Index
19 The frequency of classes of the highest order are called
A. Consistence of frequencies
B. Ultimate class frequencies
C. Independence of attributes
D. None of these
20 Simple bar chart is represented by
A. Circular region
B. Polygons
C. Rectangles
D. None of these
21 Population parameters are estimated from
A. Sample data
B. Whole data
C. Estimator
D. Population interval
22 Computer memory
A. Performs all calculations
B. Receives input data
C. is extremely limited
D. is better than human memory
23 Lack of symmetry is called
A. Dispersion
B. Moment
C. Skewness
D. Kurtosis
24 Rejecting a null hypothesis, when it is true, is called
A. Row scale
B. Simple hypothesis
C. Type 1 error
D. Type 2 error
25 A population consists of unlimited number of elementary units
A. Continuous population
B. Finite population
C. Infinite population
D. Mix population
26 Sample mean is a
A. Constant
B. Parameter
C. Variable
D. Statistic
27 _________ is the maximum variance unbiased estimator of the population variance
A. Estimator
B. Statistic
C. Sample mean
D. All of these
28 If a set contains a specific number of elements then it is called
A. Finite set
B. Infinite set
C. Universal set
D. Disjoint set
29 Level of satisfaction is
A. Continuous
B. Discrete
C. Population
D. Qualitative
30 A central value is also called
A. Central tendency
B. Variability
C. Population
D. Parameter

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