201. For two independent random variables X & Y, Var (x y)=___________?
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A. Zero

B. Var(X) Var (Y)

C. Var(X) + Var (Y)

D. Var (X)

202. The variance of randomvariable of x then var(x) = E[x-E[x]2 = E[________]?
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A. (X A)2

B. (x u)2

C. E(x)

D. (x 4)2
203. The sampling error is the_____________?
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A. Error caused by selecting a bad sample

B. Standard deviation multiplied by the sample size

C. Same as the standard error of the mean

D. Difference between the value of the sample mean and the value of the population mean
204. In a frequency distribution the last cumulative frequency is 500. Q3 must lie in_____________?
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A. 275th item

B. 375th item

C. 150th item

D. 175th item

205. The joint probability is _______________?
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A. The likelihood of two events happening given that another event has already ha

B. Based on two mutually exclusive events

C. The likelihood of two events happening together

D. Also called Prior probability

206. Which of the following Measure of Averages is not based on all the values given in the data set?
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A. Arithmetic Mean

B. Geometric Mean

C. Median

D. Mode

E. Both C. and D.
207. The Geometric Mean of -2, 4, 03, 6, 0 will be______________?
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A. None of these

B. 0

C. -3

D. 3

E. Cannot be Computed
208. The Harmonic Mean of any two numbers is________________?
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A. a+b2

B. a+b

C. 2aba+b

D. ab???

209. The probability that the sum is odd if two dice are thrown:_________________?
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A. Sep-36

B. Jun-36

C. Dec-36

D. 18/36
210. making a entrance slip in service hospital is the method of collection of data by______________?
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A. none of these

B. Correspondents

C. Registration

D. Entry

211. The sum of squared deviation is least from_________________?
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A. Mode

B. Mean

C. Standard Deviation

D. Median

212. If ?2=m4m22<3, the distribution is called______________?
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A. Normal

B. Mesokurtic

C. Leptokurtic

D. Platykurtic
213. If Y=?8X ? 5 and SD of X is 3, then SD of Y is _______________?
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A. 8

B. 24

C. None

D. 3

E. 5

214. The smallest individuals which constitute the entire population are called __________________?
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A. Sample design

B. Sampling units

C. Sampling frame

D. Sample pop

215. Geometric means of X1 and X2 is________________?
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A. X1X2????????

B. X1????+X2????

C. X1+X2????????

D. X1+X2

E. X1+X2x

216. The probability of getting at least one head when two balance coins are tossed once __________________?
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A. 4-Feb

B. 3/4

C. 4-Apr

D. 4-Jan

217. For a random variable X, E(X) is_______________?
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A. Harmonic Mean

B. Geometric Mean (GM)

C. Arithmetic Mean (AM)

D. Non

218. A random variable is that whose value is determined by the outcome of _________________?
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A. Experiment

B. Trial

C. event

D. Random experiment
219. If P(B/A)= 0.25 and P(A?B) = 0.2 then P(A) will equal to _______________?
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A. 0.45

B. 0.8

C. 0.05

D. 0.75

220. A measure of dispersion is always ________________?
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A. Positive

B. Zero

C. Negative

D. Infinity

221. The collection of one or more outcomes from an experiment is called:__________________?
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A. Event

B. Z-Value

C. Random Experiment

D. Random Variable

E. Probability

222. The algebraic sum of deviations from mean is_____________?
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A. Zero

B. Undefined

C. Minimum

D. Maximum

223. The process of selecting sample from the population is called_________________?
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A. Sampling unit

B. Sampling

C. Sampling process

D. Size

224. If the standard deviation of a population is 9, the population variance is_____________?
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A. 21

B. 3

C. 81

D. 9

225. The probability of getting exactly two heads when two balanced coins are toss once_________________?
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A. 4-Apr

B. 1/4

C. 4-Mar

D. 4-Feb

226. The number of defective bulbs in a lot is example of ____________?
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A. Function

B. Discrete variable

C. None of these

D. Continuous variable

227. In x = 2 _________ 6y the value of y are increasing by one unit then values of x are?
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A. Increasing by 6

B. Non of these

C. Decreasing by 6

D. No change

228. The probability of drawing a picture card out of 52 cards is : ______________?
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A. 13/52

B. 16/52

C. 12/52

D. Mar-52

229. The standard deviation is always _________ than mean deviation?
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A. Less

B. None

C. Greater

D. Equal

230. The probability of getting exactly three tails when three balanced coins are tossed once _______________?
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A. 8-Jul

B. 8-May

C. 8-Feb

D. 1/8
231. Dependence of difference on statistics is for_______________?
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A. Three reasons

B. Short run

C. Two reasons

D. Natural Sciences

232. Sum of dots when two dice are rolled is____________?
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A. a continuous variable

B. a constant

C. a discrete variable

D. a qualitative variable

233. A sample estimate is used to describe a characteristic of a_____________?
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A. Sample

B. Population

C. None

D. Data

234. Selection of s by the students to solve a paper is _________________?
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A. Sampling with replacement

B. Random sampling

C. Non-random sampling

D. Prob.Sampling

235. In a Poisson probability distribution __________________?
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A. The probability of success is always greater than 5

B. The number of trials is always less than 5

C. The mean and variance of the distribution are same (equal)

D. it always contains a contingency table

236. In statistics, conducting a survey means_____________?
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A. Collecting information from elements

B. None of the above

C. Making mathematical calculations

D. Drawing graphs and pictures

237. If a and b are two constants, then Var(a+bX) is_______________?
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A. Var(a)Var(X)

B. b2Var(X)

C. (ab)Var(X)

D. abVar(X)

E. bVar(X)

238. 2nd Quartile = 5th Decile = 50th Percentile = ?
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A. Mean

B. Harmonic Mean

C. Geometric Mean

D. Median

E. Mode

239. If A denotes the males of a town and B denotes the females of that town, then A and B are:___________?
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A. Equal sets

B. Over lapping sets

C. Non- overlapping sets

D. None of these

240. When data are collected in a statistical study for only a portion or subset of all elements of interest we are using?
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A. A sample

B. A Parameter

C. A Population

D. Both b and c

241. If right tail is longer than left tail then distribution is called _________________?
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A. None of these

B. All of above

C. Positively Skewed

D. Negatively Skewed

242. Attributes are _______ if they have some relation?
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A. None of these

B. In consistent

C. Associated

D. Disassociation

243. ____________ is used to criterion of consistency i.e for consistence performance?
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A. Range

B. Standard Deviation

C. Mean Deviation

D. Coefficient of Variation
244. You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 67 inches. This is an example of ?
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A. Parameter

B. Inferential Statistics

C. Population

D. Descriptive statistics

245. If 10% is added to each value of variable, the geometric mean of new variable is added by_______________?
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A. 110%

B. 90%

C. 5%

D. No Change

E. 10%
246. A experiment repeated number of time one by one is called _________________?
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A. Random

B. Introduce

C. Raw data

D. Specified

247. The product of first n natural numbers is _____________?
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A. None of these

B. n. (n-1) (n-2)..3.2.1.0

C. 1.2.3(n-2) (n-1) (n)

D. 1.2.3.4,

248. In perfect association the value of coefficient of association is ______________?
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A. 0

B. non of these

C. -1

D. +1
249. Probability of occurrence of an event lies between______________?
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A. exactly 1

B. -1 and 1

C. -1 and 0

D. 0 and 1
250. The measure of dispersion is changed by a change of_____________?
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A. Algebraic Signs

B. None

C. Origin

D. Scale