EASY
JEE Advanced
IMPORTANT
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If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately

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Important Questions on Statistics

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 16
Consider the following statements:

I. Mode can be computed from histogram.

II. Median is not independent of change of scale.

III. Variance is independent of change of origin and scale.

Which of these is/are correct?

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 17
In a series of 2n observations, half of them equal a and remaining half equal -a. If the standard deviation of the observations is 2, then |a| equals
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 18
The median of a set of 9 distinct observations is 20.5. If each of the largest 4 observations of the set is increased by 2, then the median of the new set
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 19
In an experiment with 15 observations on x, the following results were available Σx2=2830,Σx=170. One of the observation 20 was found to be wrong and was replaced by the correct value 30. Then, the corrected variance is
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 20
In a class of 100 students, there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class is 72, then what is the average of girls?
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 21
The mean of n terms is x¯. If the first term is increased by 1, second by 2 and so on, then the new mean is
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 22
In a moderately asymmetrical distribution, the mean and median are 36 and 34 respectively. Find out the value of empirical mode.
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 23
The variance of first n natural numbers is