Advertisements
Advertisements
Question
The data 6, 4, 3, 8, 9, 12, 13, 9 has mean 9.
Options
True
False
Advertisements
Solution
This statement is False.
Explanation:
The given data is 6, 4, 3, 8, 9, 12, 13, 9
Mean = `(6 + 4 + 3 + 8 + 9 + 12 + 13 + 9)/8`
= `64/8`
= 8
APPEARS IN
RELATED QUESTIONS
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 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.
Ashish studies for 4 hours, 5 hours, and 3 hours respectively on three consecutive days. How many hours does he study daily on average?
In a week, temperature of a certain place is measured during winter are as follows 26°C, 24°C, 28°C, 31°C, 30°C, 26°C, 24°C. Find the mean temperature of the week
The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, then mean of b and d is
If the mean of five observations x, x + 2, x + 4, x + 6, x + 8, is 11, then the mean of first three observations is
The average of integers between −10 to 10 is __________
Find the mean of first 10 prime numbers and first 10 composite numbers
Find the mean of the first ten even natural numbers.
The following are weights (in kg) of 12 people.
70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60.
- Find the mean of the weights of the people.
- How many people weigh above the mean weight?
- Find the range of the given data.
