The weight of 50 students in pounds are given below
82
95
120
174
179
176
159
91
85
175
88
160
97
133
159
176
151
115
105
172
170
128
112
101
123
117
93
117
99
90
113
119
129
134
178
105
147
107
155
157
98
117
95
135
175
97
160
168
144
175
If the data are arranged in the form of frequency distribution with class interval as 81-100, 101-120, 121-140, 141-160, 161-180, then the frequencies for these five classes will be
Select the correct answer using the options given below
A. 6, 9, 10, 11, 14
B. 12, 11, 6, 9, 11
C. 6, 9, 12, 12, 11
D. None of these
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Which of the following mean is most affected by extreme values?
A. Mode
B. Arithmetic mean
C. Median
D. Geometric mean
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If co-efficient of correlation is +0.9, then it shows
A. Perfect correlation
B. Absence of correlation
C. Limited amount of correlation
D. High amount of correlation
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If a boy cycles 8 km at the speed of 8 km per hour, and walks another 8 km at the speed of 2 km per hour. His average speed per hour is
A. 5 km
B. 5 16
C. 4 km
D. 6 km
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Which of the following statement is the correct?
A. X < GM < H M
B. X > GM > H M
C. X > GM < H M
D. GM > X < H M
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The modal class is a class with . . . . . . . . frequency.
A. highest
B. lowest
C. no
D. None of these
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When β2 < 3 the distribution is
A. Leptokurtic
B. Platykurtic
C. Mesokurtic
D. None of these
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Which of the following formulae is/are correct as per the relationship defined by Karl Person?
A. Only 1
B. Only 1 and 2
C. Only 2
D. Only 1 and 3
E. All 1, 2 and 3
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The error present in both the complete enumeration survey and the sample survey . . . . . . . .
A. sampling error
B. non-sampling error
C. Both A and B
D. None of these
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Which of the following is true about response rates?
A. Mail surveys usually produce lower response rates than personal interviews or telephone surveys
B. Question wording can affect a response rate
C. The longer the questionnaire, the lower the rate
D. All of the above
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Which of the following is true where data is highly positively skewed?
A. The median is the least representative average
B. All averaging techniques will produce equally acceptable results
C. The mean will tend to overstate the average
D. The mode will tend to overstate the average
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Two regression lines coincide if
A. r = 0
B. r = 2 1
C. r = − 2 1
D. r = ± 1
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The law of statistics, which says 'Moderately large number of items chosen at random from a large group possess the characteristics of the large group', is referred to as:
A. The Central Limit Theorem
B. The Law of Statistical Regularity
C. The Law of Inertia of Large Numbers
D. None of the above
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Correlation coefficient by least square method is obtained by the following formula.
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Find the median from the following data.
Gross Profit (Percent of Sales)Number of Companies
0-10
21
10-20
32
20-30
43
30-40
34
40-50
23
A. 23.40
B. 25.46
C. 40.40
D. 38.53
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5 red balls, 5 green balls and 5 yellow balls in a bag. If one ball is drawn at random then probability of that ball will be red
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Which of the following is the main benefit of snowball sampling?
A. Access deviant or hidden populations
B. Theorise inductively in a qualitative study
C. Overcome the problem of not having an accessible sampling frame
D. All of the above
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What proportion of area of a normal curve is included between (i) σ (ii) 2σ (iii) 3σ distances from the mean?
A. 34.13%, 47.72%, 49.87%
B. 60%, 70%, 90%
C. 62.27%, 95.45%, 99.73%
D. None of the above
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In a series, the difference of the two quartiles is 10, their sum is 25 and the median is 6.5, then the coefficient of skewness will be
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Which two of the following measures of central tendency are NOT capable of algebraic treatment?
A. 1 and 2
B. 4 and 5
C. 2 and 4
D. 3 and 5
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