The mean of a variable $x$ is $4$ If $y=13- x$, what will be the mean of $y$ ?
- A$4$
- B$45$
- ✓$5$
- D$1$
Answer: C.
View full solution →Question types
Measures of central tendency question types
73 questions across 6 question groups — pick any mix to generate a Statistics paper with step-by-step answer keys.
73
Questions
6
Question groups
5
Question types
01
MCQ
16 Q→021 Marks Each
15 Q→032 Mark Each
13 Q→043 Marks Each
13 Q→054 Marks Each
9 Q→065 Mark Each
7 Q→Sample Questions
Measures of central tendency questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
If the mean of $50$ observations is $15$, what will be the sum of these observations?
- A$65$
- B$4$
- C$50$
- ✓$65$
Answer: D.
View full solution →If $60 \%$ observations in the given data have the value more than $19$ , what will be the fourth decile for the data?
- A$40$
- ✓$19$
- C$60$
- D$81$
Answer: B.
View full solution →If the numbers of children in $10$ families are $1,,0,3,,,1,0,4,$, find the mode for the number of children per family
- ✓$3$
- B$1$
- C$4$
- D$0$
Answer: A.
View full solution →The observations in data are $k, k, 3 k, 4 k, 5 k$ where $k$ is a positive number If the median is $30$ , find the value of $k$
- A$30$
- B$15$
- ✓$10$
- D$6$
Answer: C.
View full solution →Find the geometric mean for the observations $7,7,7,7,7$.
View full solution →64 matches were played in a football tournament and the number of goals per match are a Follows.
Find the mode of number of goals per match.
View full solution →| No. of goals | $0$ | $1$ | $2$ | $3$ | $4$ | $5$ |
| No. of matches | $3$ | $8$ | $24$ | $14$ | $13$ | $2$ |
Find the mode of number of goals per match.
The mode for the observations of a variable is $11$ . One observation with value $11$ was added late the corrected mode.
View full solution →If the values of two observations of a variable are $12.8$ and $20$ , find its geometric mean.
View full solution →Find the value of median for a set of $15$ observations where the 8th observation has value 250 .
View full solution →The death rates of different age-groups and their suitable weights are given in the following table. Find the average death rate using weighted mean.
| Age (years) | 0-25 | 25-60 | 60 or above |
| Death rate | 11 | 8.5 | 24 |
| Weight | 3 | 6 | 1 |
After a person purchased a painting, its value increased by $50 \%$ in the first year and it decreased by $10 \%$ in the successive year. Find the average growth rate of the value using an appropriate formula.
View full solution →The mean of price $(p)$ of an item in the market is $₹ 10$. If the demand $(d)$ function of that item is $p=250-3 d$, find the mean for demand of that item.
View full solution →The geometric mean of two observations is 30 . If the value of one observation is 20 , find the value of another observation.
The weights (in gram) of 9 oranges selected from a box are as follows.
40,50,60,65,45,55,40,90,62
Find the median for weights of oranges.
40,50,60,65,45,55,40,90,62
Find the median for weights of oranges.
The number of trucks arriving in a vegetable market on seven days of a week are as follows:
$20,12,16,15,17,25,8$
Obtain the mean and median for number of trucks and hence find the mode.
View full solution →$20,12,16,15,17,25,8$
Obtain the mean and median for number of trucks and hence find the mode.
The average weight of $10$ employees working in an office is $58 \ kg$. Among the employees appointed in a recruitment drive, $5$ female employees had an average weight of $52 \ kg$ and $4$ male employees had an average weight of $60 \ kg$. Find the mean weight of all the employees in the office after the recruitment.
View full solution →The value of mean obtained from $35$ observations of a variable is $140$ . Later, it was found that the value of one observation was taken as $59$ instead of $95$ . Find the corrected mean for the variable.
View full solution →A person has received returns at the rate of $7 \%, 6 \%, 8 \%$ and $8.5 \%$ respectively for four years on his investment. Find the average percentage return using an appropriate method.
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