Advertisements
Advertisements
प्रश्न
Find the mean and mode of 6, 11, 13, 12, 4, 2
उत्तर
Arranging is ascending order: 2, 4, 6, 11, 12, 13
Mean = `"Sum of all observations"/"Number of observations"`
= `(2 + 4 + 6 + 11 + 12 + 13)/6`
= `48/6`
Mean = 8
All observations occur only once and so there is no mode for this data.
APPEARS IN
संबंधित प्रश्न
The mean is one of the numbers in a data.
The data 6, 4, 3, 8, 9, 12, 13, 9 has mean 9.
Solve any two of the following.
In some families in a colony the daily purchase of milk in litre is 1, 3, 2, 2, 4, 1, 2, 2, 1. Find the mean, median and mode of daily purchase of milk.
The` "n"^(th)` term of the A. P. 3, 8, 13, 18, ............ is 148. Find n
The calculated mean of 50 observations was 80. It was later discovered that observation 19 was recorded by mistake as 91. What was the correct mean?
The mean of five numbers is 50, out of which mean of 4 numbers is 46, find the 5th number:
Mean of 100 observations is 40. The 9th observation is 30. If this is replaced by 70 keeping all other observations same, find the new mean.
The following table shows the electricity (in units) used by 25 families of Eklara village in a month of May. Complete the table and answer the following questions.
Electricity used (units) `bb(x_i)` |
No. of Families (frequency) `bb(f_i)` |
`bb(f_ix_i)` |
30 | 7 | _________ |
45 | 2 | __________ |
60 | 8 | __________ |
75 | 5 | __________ |
90 | 3 | __________ |
N = _________ | `sum f_ix_i` = ______ |
- How many families use 45 units electricity?
- State the score, the frequency of which is 5.
- Find N, and `sum f_ix_i`
- Find the mean of electricity used by each family in the month of May.
The algebraic sum of the deviations of a set of n values from their mean is
Calculate the Mean, Median and Mode of the following data:
5, 10, 10, 12, 13.
Are these three equal ?