Table 1 shows the marks obtained by 20 students out of 25 in IQ test. Table 1: Scores for the IQ test 21 23 19 17 12 15 15 17 17 19 23 23 21 21 25 25 21 19 19 19 (a) Calculate: i. mean, mode and...

Extracted text: Table 1 shows the marks obtained by 20 students out of 25 in IQ test. Table 1: Scores for the IQ test 21 23 19 17 12 15 15 17 17 19 23 23 21 21 25 25 21 19 19 19 (a) Calculate: i. mean, mode and median for the data. i. range and inter-quartile range. ii. standard deviation and coefficient of variation of the data.