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the frequency distribution of the mark awarded to 100 candidates is as follows:- marks 1-10 13 candidates, 11-20 23 candidates, 21-30 36 candidates, 31-40 20 candidates, 41-50 8 candidates. a. construct a cumulative frequency table to represent the information above. b. estimate the lower and upper distribution. hence, determine 1. the interquartile range. 2. the semi-quartile range and c. a candidate is elected at random. calulate the probility that its mark is <(less than) or equal to 25. Solution a. upper limit comulative frequency 10 13 20 36 30 72 40 92 50 100 c. 54/100 = probability.

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- the frequency distribution of the mark awarded to 100 candidates is as follows:- marks 1-10 13 candidates, 11-20 23 candidates, 21-30 36 candidates, 31-40 20 candidates, 41-50 8 candidates. a. construct a cumulative frequency table to represent the information above. b. estimate the lower and upper distribution. hence, determine 1. the interquartile range. 2. the semi-quartile range and c. a candidate is elected at random. calulate the probility that its mark is <(less than) or equal to 25. Solution a. upper limit comulative frequency 10 13 20 36 30 72 40 92 50 100 c. 54/100 = probability

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