Consider the data : 2, 3, 9, 16, 9, 3, 9. Since 16 is the highest value in the observations, is it correct to say that it is the mode of the data? Give reason.
In a histogram, the areas of the rectangles are proportional to the frequencies. Can we say that the lengths of the rectangles are also proportional to the frequencies?
The mean of the data :
2, 8, 6, 5, 4, 5, 6, 3, 6, 4, 9, 1, 5, 6, 5
is given to be 5. Based on this information, is it correct to say that the mean of the data:
10, 12, 10, 2, 18, 8, 12, 6, 12, 10, 8, 10, 12, 16, 4
is 10? Give reason.
In a survey of 364 children aged 19-36 months, it was found that 91 liked to eat potato chips. If a child is selected at random, the probability that he/she does not like to eat potato chips is :
(A) 0.25 (B) 0.50 (C) 0.75 (D) 0.80
In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is :
(A) 0.5 (B) 0.6 (C) 0.7 (D) 0.8
Mode of the data
15, 14, 19, 20, 14, 15, 16, 14, 15, 18, 14, 19, 15, 17, 15 is
(A) 14 (B) 15 (C) 16 (D) 17
Median of the following numbers :
4, 4, 5, 7, 6, 7, 7, 12, 3 is
(A) 4 (B) 5 (C) 6 (D) 7
For drawing a frequency polygon of a continous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abcissae are respectively :
(A) upper limits of the classes (B) lower limits of the classes
(C) class marks of the classes (D) upper limits of perceeding classes
The median of the data
78, 56, 22, 34, 45, 54, 39, 68, 54, 84 is
(A) 45 (B) 49.5 (C) 54 (D) 56
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