Deck 7: Statistics and Probability

Question 1

Mean deviation is

A)a relative measures
B)an absolute measures
C)both (a) and (b)
D)none of the above

Answer 1

an absolute measures

Question 2

Interquartile range is the difference between

A)the highest value and the lowest value
B)median and mean
C)the third quartile and the first quartile
D)none of the above

Answer 2

the third quartile and the first quartile

Question 3

Which of the following is least when deviations are taken from the median

A)range
B)quartile deviation
C)mean deviation
D)standard deviation

Answer 3

mean deviation

Question 4

Which average is affected most by extreme observation?

A)Mode
B)Median
C)Geometric mean
D)None of the above

Question 5

A geometric mean of two numbers 12 and 27 is

A)9
B)12
C)18
D)21

Question 6

Statistics can be best considered as

A)An art
B)Science
C)Both art as well as science
D)None of the above

Question 7

Lowest value of variance can be

A)1
B)-1
C)2
D)0

Question 8

The standard deviation and variance are _______ of origin?

A)Multiplied
B)Variance
C)Independent
D)None of the above

Question 9

Statistics can be best considered as:

A)a science
B)an art
C)both science as well as art
D)neither science nor art

Question 10

Statistics is helpful in:

A)formulating and testing hypothesis
B)prediction
C)formulation of suitable policies
D)all of the above

Question 11

A set of vertical bars whose areas are proportional to the frequencies represented is known as:

A)Histogram
B)Frequency polygon
C)Ogive
D)none of the above

Question 12

The value in a series of observations which occurs with the greatest frequency is called:

A)median
B)mean deviation
C)standard deviation
D)mode

Question 13

What is the median of the sample 5, 5, 11, 9, 8, 5, 8?

A)5
B)6
C)8
D)9

Question 14

Karl Pearson has expressed the relationship between Mean, Median, and Mode as:

A)Mode = Mean - 3 [Mean - Median]
B)Mode = 3 Median - 2 Mean
C)Median = Mode + 2/3 [Mean - Mode]
D)All of the above

Question 15

The average difference between the items in a distribution and the median or mean of that series is known as:

A)Range
B)Mean deviation
C)Inter-quartile range
D)Standard deviation

Question 16

If two events cannot occur simultaneously at the same trial then they are

A)dependent events
B)independent events
C)mutually exclusive events
D)simple events

Question 17

If two events A and B are independent, the probability that they will both occur is given by

A)P (A) + P (B)
B)P (A) x P (B)
C)P (A) - P (B)
D)P (A) + P (B) - P (AB)

Question 18

Those in which the occurence or non occurence of an event in any one trial affects the probability of other event in other trial. This is known as

A)dependent event
B)independent event
C)complementary event
D)exhaustive event

Question 19

If the probability of drawing a spade from a well shuffled pack of playing card is 14 then the probability that of the card drawn from a well shuffled pack of playing card is 'not a spade' is

A)1
B)12
C)14
D)34

Question 20

The coefficient of correlation

A)has no limit
B)should be less than 1
C)should be more than 1
D)varies between -1 and +1

Question 21

In a box, there are 8 red,7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

A)1/3
B)3/4
C)7/19
D)9/21

Question 22

Probability sampling and random sampling are

A)Anonymous
B)Different terms
C)Synonymous
D)None of the above