QUIZ
Q.1 Statistically, the spread or scatterness of observations in a data is called
a) discriminant
b) dispersion
c) range
d) standard deviation
Q.2 The mean of the squared deviations of some observations from their arithmetic mean is
called
a) standard deviation
b) variation
c) median
d) mode
Q.3 Sum of the deviations of a variable from its mean is always
a) 0
b) 1
c) 2
d) 5
Q.4 The measures that are used to determine the degree or extent of variation in a data set are
called
a)
b)
c)
d)
mean
median
measures of dispersion
measures of central tendency
Q.5 The extent or the degree to which data tend to spread around __________ is called the
dispersion or variation of data.
a)
b)
c)
d)
geometric mean
quartiles
average
harmonic mean
Q.6 Interquartile range is the difference between _________________.
a)
b)
c)
d)
mean deviation and standard deviation
the third quartile and the first quartile
median and mean
the highest value and the lowest value
Q.7 Empirical relationship between quartile deviation and standard deviation is given by
a)
b)
c)
d)
QD=⅔ σ
QD=8/3 σ
QD=11/3 σ
QD=4/3 σ
Q.8 Which is not a member of the five-number summary?
a)
b)
c)
d)
First quartile
Mean
Median
Third quartile
Q.9 If a card is chosen from a standard deck of cards, what is the probability of getting a five or a
seven?
a) 4/52
b) 1/26
c) 8/52
d) 1/169
Q.10 If you roll a pair of dice, what is the probability that (at least) one of the dice is a 4 or the
sum of the dice is 7?
a) 4/36
b) 13/36
c)
21/36
d) 15/36
Q.11 The probability of getting exactly one head in tossing a pair of coins is
a) 0
b) 1
c) 1/3
d)1/2
Q.12 The total number of events of throwing 10 coins simultaneously is
a) 1024
b) 512
c) 100
d) 10
Q.13 Three coins are tossed simultaneously. The probability of getting all heads is
a)
b)
c)
d)
1
½
¼
1/8
Q.14 Cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. A card is taken
out from the bag at random. The probability that the number on the card taken out is an even
number, is
a)
b)
c)
d)
1/20
¼
1/3
1/2
Q.15 A girl calculates that the probability of her winning the first prize in a lottery is 8100. If
6,000 tickets are sold, how many tickets has she bought?
a)
b)
c)
d)
400
750
480
240
Q.16 A card is drawn from a well shuffled deck of 52 cards. The probability of a seven of spade
is
a)
b)
c)
d)
1/26
1/52
3/52
1/13