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Online Tests
ECAT Pre General Science Statistics Online Test MCQs With Answers
Question # 1
If x and y are independent variables, then two lines of regression are
Choose an answer
x= 0, y = 0
x = 0, y = const
x = const, y = 0
x= const, y = const
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Question # 2
Quantities which don't vary from individual to individual are called
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Variables
Surveys
Constant
Parameters
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Question # 3
_______ is a quantity computed from a population when the entire population is available.
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Variables
Surveys
Ratio
Parameters
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Question # 4
For a two tailed test of hypothesis at alpha = 0.10, the acceptance region is the entire region
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To the right of the critical value
Between the two critical values
Outside of the two critical values
To the left of the positive critical value
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Question # 5
If no attributes are specified, then the order of the class is
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0
1
n
None of these
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Question # 6
Most of the decisions that affect our daily lives are based upon
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Absolute certainty
Likelihood
Independent
None of these
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Question # 7
The probability density function of a continuous random variable Y is specified by a
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straight line
Rectangle
Smooth curve
Circle
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Question # 8
The collecting of information from a part of the population is called making a
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Census
Complete enumeration
Discrete sampling
None of these
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Question # 9
A well defined collection of distinct objects is called
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Probability
Chance
Element
A set
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Question # 10
The mean of the absolute deviations between the values and their median is called
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Population
Standard deviation
Range
Mean deviation
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Question # 11
G.M becomes zero if any of the observation is
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zero
1
similar
Opposite
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Question # 12
A central value is also called
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Central tendency
Variability
Population
Parameter
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Question # 13
The first moment about mean is equal to
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Mean
Zero
Median
Mode
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Question # 14
Mean deviation is always
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Greater than S.D
Less than S.D
Equal to S.D
Negative
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Question # 15
In chain base year method, the _________ is fixed
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Year
Price
Quantity
Price and quantity
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Question # 16
The attributes denoted by A, B, ................ are called
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Positive attributes
Negative attributes
Contingency attributes
None of these
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Question # 17
The purpose of simple linear regression analysis is to
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Replace points on a scatter diagram by a straight line
Measure the degree to which two variables are linearly associated
Predict one variable from another vaiable
None of these
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Question # 18
In the study of two attributes, (B) =
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(A
β) + (
αB)
(AB) + (A
β)
(B) + (
β)
(AB) + (
α
β)
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Question # 19
Link relatives are not directly comparable because they have
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Fixed base
Not fixed base
Zero values
None of these
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Question # 20
Bias is
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Non random error
Option A & C
Cumulative
None of these
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Question # 21
The point in time at which the selected number was measured is referred to as the
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Index number
Base period
Relative price
Weighted Index
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Question # 22
When a pair of dice is rolled, the sample space consists of
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6 outcomes
36 outcomes
12 outcomes
24 outcomes
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Question # 23
The probability distribution of a discrete random variable is usually written with the help of a function, called its
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Formula
Variable
Random variable
Discrete variable
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Question # 24
The Greek letters
α ,
β ....... are used to denote the ________ of A,B,C ............
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Presence
Inverse
Absence
None of these
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Question # 25
The degree of relationship between the two attributes is called
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Association
Dichotomy
Variable
None of these
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Question # 26
Sum of absolute deviations are minimum if computed from
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Mean
Median
Mode
Range
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Question # 27
The two regression lines are perpendicular to each other if
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r = 1
r = 0
r = -1
None of these
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Question # 28
Sample mean is a
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Constant
Parameter
Variable
Statistic
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Question # 29
In chain base method, the base period is
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Fixed
Not Fixed
Constant
None of these
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Question # 30
The null hypothesis always refers to a specified value of the
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Population parameter
Statistic
Sample statistic
None of these
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Question # 31
A computer can execute
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a flow chart
a program
an algorithm
all of the above
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