a. The table shows the height of teak trees harvested by a farmer: Find the median height.
| Height(m) | 3 | 4 | 5 | 6 | 7 | 8 |
| number of trees | 4 | 6 | 4 | 5 | 6 | 2 |
b. calculate and correct to one decimal place the: i. mean; ii. standard deviation.
The scores of students in a test are recorded as follows: 4, 3, 3, 2, 1, 2, 5, 7, 8, 3, and 5. Find the mode of the mark.
The average age of the four female teachers in a school is 40 and the average age of eight male teachers in the school is 25. Calculate the average age of the teachers in the school.
The mean of the numbers 13, 16, x, 18, 21, 2x, 35, is 22. Find the value of x
Find the variance of a group of data whose standard deviation is 12.34 to the nearest whole number.
