1. College X organised a mid-semester test in last September. The marks of 135 students were recorded in the following table. Marks Relative Frequency 8. 0

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1. College X organised a mid-semester test in last September. The marks of 135 students were recorded in the<br>following table.<br>Marks<br>Relative Frequency<br>8.<br>0<xs 20<br>135<br>31<br>20 < x< 40<br>135<br>41<br>40 < x S 60<br>135<br>60 < x S 80<br>45<br>34<br>80 <xs 100<br>135<br>a) Find the upper quartile.<br>b) Calculate the median, mean and the standard deviation of the marks.<br>c) Hence, find the Pearson's coefficient of skewness and interpret your answer.<br>d) State with reason, which of the above measures of location better describes the distribution of the data.<br>e) From the analysis of students' marks, Mr Adam decided to do one-to-one consultation with his low-ability<br>students and give 5 questions per week as a revision to the rest of his students. Calculate the mark<br>required to join the consultation if 55% of his students were assigned to do the revision.<br>

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Jun 10, 2022

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1. College X organised a mid-semester test in last September. The marks of 135 students were recorded in the following table. Marks Relative Frequency 8. 0

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