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 probability distribution of a discrete random variable can be described with the help of a two Rows table Column table Circles Curves
2 The probability density function of a continuous random variable Y is specified by a straight line Rectangle Smooth curve Circle
3 The probability distribution of a discrete random variable is usually written with the help of a function, called its Formula Variable Random variable Discrete variable
4 The probability distribution of a discrete random variable is usually called its probability Inverse function Mass function Density function Frequency function
5 Recording the time (minutes) taken by the customers to wait for its turns in a utility store while standing in a queue, is an example of Discrete variable Continuous variable Constant Parameter
6 The height of students, between 5.0 and 5.9 feet, is an example of Discrete variable Continuous variable Constant Parameter
7 The sum of probabilities of events of a sample space is always Zero One Two Infinity
8 Random variable is also called Changing Stochastic Chance or stochastic None of these
9 A variable whose values depend upon the outcomes of a random experiment is called a Constant Parameter Random variable Continuous variable
10 If P(B) = 0, then the conditional probability is zero 1 undefined -1
11 When each outcome of a sample space is as likely to occur as any other, the outcomes are called Mutually exclusive Exhaustive Equally likely None of these
12 When a pair of dice is rolled, the sample space consists of 6 outcomes 36 outcomes 12 outcomes 24 outcomes
13 Probaility of an event cannot be Positive One Negative None of these
14 A set containing only one element is called Disjoint set Singleton set Universal set Proper set
15 A set consisting of all the elements of the sets under consideration is called the Universal set Disjoint set Overlapping set Proper set
16 If a set contains a specific number of elements then it is called Finite set Infinite set Universal set Disjoint set
17 A set that contains no element is called Null set Singleton set Zero set Infinite set
18 A well defined collection of distinct objects is called Probability Chance Element A set
19 Most of the decisions that affect our daily lives are based upon Absolute certainty Likelihood Independent None of these
20 Link relatives are not directly comparable because they have Fixed base Not fixed base Zero values None of these
21 In chain base year method, the _________ is fixed Year Price Quantity Price and quantity
22 In chain base method, the base period is Fixed Not Fixed Constant None of these
23 If all items are given equal weight, the index number is called Weighted Unweighted Relative Composite
24 An index number calculated for more than one items is called Composite Simple Relative None of these
25 The weighted price index is sometimes referred to as the Simple price Composite index Multi index None of these
26 Indices that involve a group of commodities are referred to as Simple indices Common indices Aggregate indices Relative indices
27 The base period in fixed base should be A normal year Average of normal years Any year None of these
28 The index numbers are calculated in Decimal Ratios Percentages Option "A" and "B"
29 The point in time at which the selected number was measured is referred to as the Index number Base period Relative price Weighted Index
30 The variance of a constant is Constant Zero One None of these
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