Advertisements
Advertisements
Question
In a research laboratory scientists treated 6 mice with lung cancer using natural medicine. Ten days later, they measured the volume of the tumor in each mouse and given the results in the table
| Mouse marking | 1 | 2 | 3 | 4 | 5 | 6 |
| Tumor Volume (mm3) | 145 | 148 | 142 | 141 | 139 | 140 |
Find the mean
Advertisements
Solution
| Mouse marking (f) |
Tumor Volume (mm3) (x) |
fx |
| 1 | 145 | 145 |
| 2 | 148 | 296 |
| 3 | 142 | 426 |
| 4 | 141 | 564 |
| 5 | 139 | 695 |
| 6 | 140 | 840 |
| `sumf` = 21 | `sumfx` = 2966 |
`bar(x) = (sumfx)/(sumf)`
= `2966/21`
= 141.238
= 141.24
The Arithmetic mean = 141.24 mm3
APPEARS IN
RELATED QUESTIONS
The mean of 35 observations is 20, out of which mean of first 18 observations is 15 and mean of last 18 observation is 25. Find the 18th observation.
There are 40 students in a class, out of them 15 are boys. The mean of marks obtained by boys is 33 and that for girls is 35. Find out the mean of all students in the class.
The mean weight of 4 members of a family is 60 kg. Three of them have the weight 56 kg, 68 kg and 72 kg respectively. Find the weight of the fourth member
The mean of a set of seven numbers is 81. If one of the numbers is discarded, the mean of the remaining numbers is 78. The value of discarded number is
The mean of the square of first 11 natural numbers is
If the average selling price of 15 books is ₹ 235, then the total selling price is __________
The average of the marks 2, 9, 5, 4, 4, 8, 10 is ____________
The mean height of 11 students in a group is 150 cm. The heights of the students are 154 cm, 145 cm, Y cm, Y + 4 cm, 160 cm, 151 cm, 149 cm, 149 cm, 150 cm, 144 cm and 140 cm. Find the value of Y and the heights of two students?
Mean can never be a fraction.
Find the mean of the first ten even natural numbers.
