Answer to Question #88717 in Economics for Daniel Udoh

Question

1. The raw scores of 20 students of Whitesands School who took part in an examination in Economics are given below. The pass marks is
40%
38 28 70 43
39 20 64 66
12 46 52 53
20 34 48 69
18 20 64 34
(a) What is the mean score of the students’ marks?
(b) How many students passed the examination?
© What percentage of the students failed the examination?
(d) What is the range of the scores?
(e) How many students scored below the mean score?

Answer 1

(a) The mean score of the students’ marks is:

X = (38 + 28 + 70 + 43 + 39 + 20 + 64 + 66 + 12 + 46 + 52 + 53 + 20 + 34 + 48 + 69 + 18 + 20 + 64 + 34) /20 = 41.9%.

(b) 10 of 20 students passed the examination, because their score is higher than 40%.

(c) The percentage of the students that failed the examination is: (20 - 10)/20×100% = 50%.

(d) What is the range of the scores is 70 - 12 = 58.

(e) 10 students scored below the mean score.