The following are the masses in kilogram of forty girls in a school. Draw up a frequency table using class intervals, class mark 12-16, 17-21, 22-26 for distribution. 27 38 39 47 36 57 39 29 52 46 13 24 15 29 12 27 53 27 56 39 38 13 37 29 42 41 26 35 22 31 36 29 22 31 29 13 27 43 26 18

Question

The following are the masses in kilogram of forty girls in a school. Draw up a frequency table using class intervals, class mark 12-16, 17-21, 22-26 for distribution. 27 38 39 47 36 57 39 29 52 46 13 24 15 29 12 27 53 27 56 39 38 13 37 29 42 41 26 35 22 31 36 29 22 31 29 13 27 43 26 18

Answer 1

To create a frequency table using class intervals, we need to group the data into different ranges.

Here is a frequency table with class intervals of 12-16, 17-21, 22-26, and the corresponding frequencies:

Class Interval | Frequency
----------------------------
12-16 | 3
17-21 | 2
22-26 | 5
27-31 | 7
32-36 | 5
37-41 | 4
42-46 | 2
47-51 | 1
52-56 | 2
57-61 | 1

To find the frequencies, we count the number of data points that fall within each class interval. For example, in the class interval 12-16, there are three data points (13, 15, 13).