Statistics for Data Analyst

The post is about the Random Variable MCQ Test. There are 20 multiple-choice questions about random variables. The quiz covers topics related to the basic concept of random variables, real-life examples of random variables, random experiments, types of random variables, and distribution of random variables. Let us start the quiz random variable MCQ Test.

Online MCQs about Random Variables with Answers

1. A random variable assuming only a finite number of values is called:

 Random variable

 None of these

 Discrete random variable

 Continuous random variable

2. The lifetime of a car tire is

 Discrete variable

 Qualitative variable

 Random variable

 Continuous variable

3. A random variable is also called

 Attribute

 Constant

 Chance variable

 Variable

4. Height measurements of 50 students studying in a college

 Random variable

 Discrete variable

 Constant

 Continuous variable

5. The sum of probabilities of a discrete random variable is

 Three

 Zero

 One

 Four

6. A variable whose value is determined by the outcome of a random experiment is called

 Constant

 Random

 None of these

 Random variable

7. If $X\sim N(\mu, \sigma^2)$ and $a$ and $b$ are real numbers, then the mean of $(aX+b)$ is

 $a+b$

 $a+b\mu$

 $a\mu+b$

 $a\mu$

8. The speed of the car is an example of

 Continuous variable

 Absolute variable

 Discrete variable

 None of these

9. A variable which can assume each and every value within a given range is called

 Qualitative variable

 Random variable

 Discrete variable

 Continuous variable

10. The number of students in a class is an example of

 None of these

 Definite variable

 Continuous variable

 Discrete variable

11. The observed value of a statistic is:

 A random variable

 A fixed variable

 A constant

 Neither of these

12. If $x$ is a discrete random variable, the function $f(x)$ is

 Density function

 None of these

  Distribution function

 Probability function

13. Random numbers can be generated mechanically by

 Use of digital computers

 Use of random numbers table

 Ordinary calculators

 None of these

14. If $X$ and $Y$ are random variables then $E(X+Y)$ is equal to

 $ E(X) + Y $

 $ E(X) – E(Y) $

 $ E(X) + E(Y) $

 None of these

15. Suppose, four coins are tossed, the value of a random variable $H$ (No. of heads) is:

 0, 1

 0, 1, 2, 3, 4

 1, 2, 3, 4

 0, 1, 2, 3

16. A quantity which can vary from one individual to another is called

 Constant

 Data

 Variable

 None of these

17. A random variable assuming an infinite number of values is called

 Absolute variable

 Discrete random variable

 None of these

 Continuous random variable

18.

If $X$ is a uniform variate $U(5, 10)$ then the variance of $X$ is

 2.08

 5

 7.5

 0.417

19. If $X$ is a uniform variate $U(5, 10)$ then the mean of $X$ is

 10

 7.5

 5

 15

20. A chi-square random variable can assume the value:

 Negative

 Positive

 Both negative and positive

 Fractional

 Loading …

Online Random Variable MCQ Test

• A random variable is also called
• A random variable assuming only a finite number of values is called:
• A random variable assuming an infinite number of values is called
• The number of students in a class is an example of
• The speed of the car is an example of
• Random numbers can be generated mechanically by
• Suppose, four coins are tossed, the value of a random variable $H$ (No. of heads) is:
• A quantity which can vary from one individual to another is called
• A variable which can assume each and every value within a given range is called
• The lifetime of a car tire is
• Height measurements of 50 students studying in a college
• A variable whose value is determined by the outcome of a random experiment is called
• If $x$ is a discrete random variable, the function $f(x)$ is
• If $X$ and $Y$ are random variables then $E(X+Y)$ is equal to
• The sum of probabilities of a discrete random variable is
• A chi-square random variable can assume the value:
• The observed value of a statistic is:
• If $X$ is a uniform variate $U(5, 10)$ then the mean of $X$ is
• If $X$ is a uniform variate $U(5, 10)$ then the variance of $X$ is
• If $X\sim N(\mu, \sigma^2)$ and $a$ and $b$ are real numbers, then the mean of $(aX+b)$ is

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The post is about the MCQs Index Numbers Quiz. There are 20 multiple-choice questions covering the topics related to simple and weighted index numbers, retail price index numbers, consumer price index numbers, average and aggregate index numbers, and chain base index numbers. Let us start with MCQs Index Numbers Quiz.

Please go to Important MCQs Index Numbers Quiz 5 to view the test

MCQs Index Numbers Quiz

• Express the following average weekly wages as index numbers with base 1998 to 1 dp
• Base year weighted index numbers are
• Current year quantities are used as weights in
• Paasche’s price index number is
• The index number given by $\frac{\Sigma p_nq_0}{\Sigma p_0q_0}\times 100$ is
• If $\Sigma p_1q_0=403$, $\Sigma p_0q_0=283$, then index number is
• Fisher’s index number is ————- of Laspeyres and Paasche’s index numbers
• Computing methods of consumer price index are
• Retail price index numbers are also called
• Another name for consumer price index number is
• The aggregate expenditure method and family budget method give
• Which method of construction of CPI number is the Laspeyres index number
• In 2000, the retail price index was 178 with 1990 = 100. Convert a weekly wage of $400 back to 1990 constant prices, giving your answer correct to the nearest penny.
• Complete the following table which shows two index number series being spliced together to give a single series based on 1997. Give your answers correct to one dp.
• Complete the following table in which a chain-based index is being converted to one with a fixed base 1997. Give your answers correct to one decimal place.
• You are assisting with the work on a maintenance department’s budget for the next quarter of 2000. The maintenance department’s budget for the current quarter (just ending) is $200,000. Its use of materials, and their respective prices, are shown below. You require an all-item price index for materials for the next quarter, using the current quarter as a base and the current quantities as weights. Complete the table by filling in the appropriate numerical value in the spaces indicated by the letters.
• Calculate the required index, using the formula $100\times \left(\frac{\Sigma wP_1}{\Sigma wP_0}\right)$ giving your answer to one dp.
• If the price index ($100\times \left(\frac{\Sigma wP_1}{\Sigma wP_0}\right)$) calculated was 104, estimate the budget for the next quarter, giving your answer to the nearest $\$000$. You are assisting with the work on a maintenance department’s budget for the next quarter of 2000. The maintenance department’s budget for the current quarter (just ending) is $\$200,000$. Its use of materials, and their respective prices, are shown below.  
• If a price index is 104, which of the following statements is/are correct about average prices?  
• Which of the following statements about the base time is/are correct?

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The post is about the MCQs Index Numbers Quiz. There are 20 multiple-choice questions covering the basics of index numbers, weighted index numbers, price index numbers, chain base methods, and price relatives. Let us start with the MCQs Index Numbers Quiz.

Please go to Important MCQs Index Numbers Quiz 4 to view the test

Online MCQs Index Numbers Quiz

• Express the following average weekly wages as index numbers with base 1998.
• If the index for 2003 were to be 116 and the RPI 204, express the index for 2003 at constant 1998 prices.
• If the average wages index for 2003 at constant 1998 prices were to be 96, which of the following comments would be correct?
• The following table shows the index of prices (1995=100) for a certain commodity over the period 1995-2000:It has been decided to rebase the index so that 2005=100. The index for 2003 will now be nearest to
• The following table shows the index of prices (1995=100) for a certain commodity over the period 1995-2000: The percentage increase in the price between 2002 and 2004 is nearest to
• Price relative = $\frac{?}{p_0}\times$
• The index for the base period is always taken as
• In the fixed base method, the base period should be
• Commodities subject to considerable price variations can best be measured by a
• In the chain base method, the base period is
• The chaining process used to make a comparison of the index numbers is
• Price relatives computed for the chain base method are called
• In index numbers ———- can be used as the average
• The most suitable average for index numbers is
• If all the items are given equal weights the index number is called
• If all values are not of equal importance the index number is called
• Which index number may be weighted
• Index numbers computed by considering the relative importance of variables are called
• The weights used in the price index are
• Weighted price index numbers include

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