CDS || Mathematics || Statistics || 26-01-2019

Attempt now to get your rank among 405 students!

Question 1

With the help of histogram one can prepare

• AFrequency polygon
• BFrequency curve
• CFrequency distribution
• DAll of the above

Question 2

The heights (in cm) of 5 students are 150, 165, 161, 144 and 155. What are the values of mean and median (in cm) respectively?

• A165 and 161
• B155 and 155
• C160 and 155
• D155 and 161

Question 3

The mean of 25 observations is 36. The mean of first 13 observations is 32 and that of last 13 observations is 39. What is the value of observation ?

• A20
• B23
• C32
• D40

Question 4

The marks of the students of a class who appeared for a test in English are represented in the following frequency table:


What is/are the modal class(es)?

• A10.5-20.5 only
• B20.5-30.5 only
• C10.5-20.5 and 20.5-30.5
• DThere is no modal class

Question 5

If each of n numbers x_i = I (I = 1, 2, 3, …n) is replaced by (I + 1) x_i, then the new mean is

• A
• B
• C
• D

• 405 attempts
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