The class marks of a continuous distribution are :
1.04, 1.14, 1.24, 1.34, 1.44, 1.54 and 1.64
Is it correct to say that the last interval will be 1.55 – 1.73? Justify your answer
Is it correct to say that in a histogram, the area of each rectangle is proportional to the class size of the corresponding class interval? If not, correct the statement.
A child says that the median of 3, 14, 18, 20, 5 is 18. What doesn’t the child understand about finding the median?
In a diagnostic test in mathematics given to students, the following marks (out of 100) are recorded :
46, 52, 48, 11, 41, 62, 54, 53, 96, 40, 98, 44
Which ‘average’ will be a good representative of the above data and why?
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
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