1051. If X and Y are independent then SD (X ? Y) is________________?
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A. SD(X)?SD(Y)

B. Var(X)+Var(Y)????????????????

C. If Y=?8X ? 5 and SD of X is 3, then SD of Y is

D. SD(X)+SD(Y)

E. SD(X)+SD(Y)???????????????

1052. If the standard deviation of a population is 9, the population variance is_____________?
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A. 21

B. 81

C. 9

D. 3

1053. The weights of students in a college/school is a___________?
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A. None of these

B. Continuous Variable

C. Qualitative Variable

D. Discrete Variable

1054. The data collected by NADRA to issue National Identity cards are______________?
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A. Official data

B. Primary data

C. Secondary data

D. un-official data

1055. Given the N values in a series, the geometric mean is______________?
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A. The square root of the product of N values

B. The fourth root of the product of N values

C. The Nth root of the product of N values

D. The third root of the product of N values

1056. In a distribution of 10, 20, 30, 40, 50, the x is 30, the sum of deviations from x will be:________?
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A. 30

B. 15

C. 60

D. Zero
1057. The middle value of an ordered array of numbers is the____________?
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A. Mean

B. Median

C. Mid Point

D. Mode

1058. According to the empirical rule, approximately what percent of the data should lie within ???
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A. 95%

B. 90%

C. 75%

D. 99.70%

1059. A contractor employs 20 male, 15 female and 5 children in his factory. Male wages are Rs. 10 per day, female Rs. 8 per day, and children Rs. 3 per day. The weighted x of wages paid per day will be_____________?
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A. 10.63

B. 3.86

C. 9.21

D. 8.37
1060. Village Patwari collecting the data about cotton crops is the example of_____________?
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A. Constant

B. Primary data

C. Secondary data

D. variable

1061. Statistics Laws are true________________?
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A. In each case

B. Average

C. Facts

D. Field

1062. Life of a T.V picture tube is a:___________?
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A. Qualitative variable

B. Constant

C. Continuous variable

D. Discrete variable

1063. In statistics, conducting a survey means_____________?
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A. Drawing graphs and pictures

B. Making mathematical calculations

C. None of the above

D. Collecting information from elements
1064. The number of accidents in a city during 2012 is____________?
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A. Constant

B. Continuous variable

C. Discrete variable

D. Qualitative variable

1065. The calculation of mean and variance is based on______________?
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A. Extreme values only

B. All values

C. Small values only

D. Large values only

1066. The height of a student is 60 inches. This is an example of________________?
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A. Qualitative data

B. Discrete data

C. Categorical data

D. Continuous data
1067. Which of these represent qualitative data______________?
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A. Liking or disliking of (500) persons of a product

B. Height of a student

C. Income of a government servant in a city

D. Yield from a wheat plot

1068. Which of the following is not based on all the observations ?
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A. Geometric Mean

B. Mode

C. Weighted Mean

D. Arithmetic Mean

E. Harmonic Mean

1069. The Harmonic Mean of any two numbers is________________?
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A. a+b

B. ab???

C. a+b2

D. 2aba+b
1070. If a distribution is abnormally tall and peaked, then is can be said that the distribution is_____________?
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A. Pyrokurtic

B. Mesokurtic

C. Platykurtic

D. Leptokurtic
1071. Founder of statistics is_________?
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A. Karl pearson

B. Neyman

C. Smith

D. R A Fisher

1072. Lowest value of variance can be________________?
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A. 1

B. 3

C. 0

D. -1

E. -3

1073. Most of the recent developments in statistics arose to meet the needs of ____________?
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A. Three reasons

B. Biology

C. Hands

D. Physics

1074. Standard deviation is calculated from the Harmonic Mean (HM) ________________?
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A. Sometimes

B. Always

C. Never

D. None of these

1075. Which of the following divides a group of data into four subgroups?
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A. Deciles

B. Standard Deviation

C. Quartiles

D. Median

E. Percentiles

1076. Statistics has handicap dealing with_____________?
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A. Constant

B. Quantitative data

C. Qualitative data

D. Variable

1077. A parameter is a measure which is computed from___________?
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A. None of these

B. Sample data

C. Population data

D. Test statistics

1078. A numerical value calculated from sample is called____________?
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A. Economics

B. Statistic

C. Mathematics

D. None of these

1079. _________ statistics deals with collection, presentation and analysis of data?
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A. Descriptive

B. Collection

C. Inferential

D. Two

1080. For a certain distribution if ?(x?2)=18,?(x?24)=0,?(x?28)=?24) then arithmetic mean is_______________?
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A. 28

B. 24

C. 21

D. 0

1081. Dependence of difference on statistics is for_______________?
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A. Three reasons

B. Natural Sciences

C. Two reasons

D. Short run

1082. The mean of a constant b is_________________?
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A. b

B. Zero

C. None

1083. The grouped data is also called_____________?
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A. Secondary data

B. Primary data

C. Qualitative data

D. Raw data

1084. If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?
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A. 20%

B. None of these

C. 25%

D. 100%

1085. The mean of a distribution is 23, the median is 24, and the mode is 25.5. It is most likely that this distribution is_____________?
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A. Symmetrical

B. Negatively Skewed

C. Positively Skewed

D. Asymptotic

1086. If x is 4 and the distribution is 2, 3, 4, 5, 6, the sum of squared deviations from the x will be______________?
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A. 10

B. 12

C. 8

D. 6

1087. Variance remains unchanged by change of________________?
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A. Scale

B. None of these

C. Origin

D. Both

1088. Primary data and _____________ data are same?
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A. Ungrouped

B. Secondary data

C. None of these

D. Grouped

1089. _________ used the word statistics for the first time during one of his lectures at a German university?
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A. unavoidable

B. Fisher

C. Achenwall

D. Feet

1090. Geometric means of X1 and X2 is________________?
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A. X1????+X2????

B. X1+X2x

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

D. X1+X2

E. X1X2????????
1091. Results obtained by counting are_____________?
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A. Continuous

B. Discrete

C. Both (a) and (b)

D. None of these

1092. Which sampling technique is appropriate when there is homogeneity in population?
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A. Stratified sampling

B. Cluster sampling

C. Systematic sampling

D. Simple random sampling
1093. Data regarding opinions of consumers about some product obtained through lady workers are ____________?
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A. Primary

B. Secondary

C. Cheapest method

D. Existing Sources
1094. The average of first n natural numbers is_______________?
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A. All of the above

B. n2

C. n+12

D. None of these

1095. Lack of symmetry is called_______________?
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A. Relative Dispersion

B. Absolute Dispersion

C. Skewness

D. Non of these

1096. For Mesokurtic curve of the distribution, ?2 is__________________?
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A. 3

B. None of these

C. 3

D. Zero

1097. When the word random variable use in statistics it must have?
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A. Probability distribution

B. None of these

C. Variable

D. Values

1098. Which of the following describe the middle part of a group of numbers ?
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A. Measure of Central Tendency

B. Measure of Shape

C. Measure of Association

D. Measure of Variability

1099. Usually measurements give rise to ________ data?
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A. Discrete

B. Continuous

C. Specific

D. Constant

1100. If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________?
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A. 0

B. 2.58

C. 4.66

D. 5

E. 2.33