Statistics

Measures of Dispersion (Part 1) 7.2a Range (A) Range of Ungrouped Data Example 1: Find the range for the set of data 2, 4, 7, 10, 13, 16 and 18. Solution: Range = largest value – smallest value    = 18 – 2    = 16 (B) Range of Grouped Data (with Class Interval) Example … Read more

7.1c Median1. The median of a group of data refers to the value which is at the middle of the data after the data has been arranged according to grouped data and ungrouped data. (A) Ungrouped Data Example 1: Find the median for each of the sets of data given below. (a) 15, 18, 21, … Read more

7.1b Mode Mode is the observation which has the highest frequency in a set of data. Example: Find the mode for each of the sets of data given below. (a) 15, 18, 21, 25, 20, 18 (b) 3, 6, 9, 11, 17 (c) 0, 1, 2, 7, 3, 2, 1, 1, 2, 1, 2 Solution: … Read more

7.1a Mean 1. The mean of the data is an average value obtained by using the formula: Mean= Total data values Number of data (A) Ungrouped Data Example 1 (a) Find the mean for the set of data 2, 4, 7, 10, 13, 16 and 18. (b) A value of xis added into the above set of data, the … Read more