b. Calculate the mark required to gain a distinction if the top 10% of the students are awarded a distinction.

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8B ONLY
8 The following table shows the marks of 120 students.
Marks
0<x< 20
Frequency
9
20<x< 40
40<x< 60
60 <x< 80
29
42
26
80 < x< 100
14
a. Find the mean, median, mode, first quartile, third quartile and interquartile range for the
following data.
b. Calculate the mark required to gain a distinction if the top 10% of the students are awarded a
distinction.
Transcribed Image Text:8 The following table shows the marks of 120 students. Marks 0<x< 20 Frequency 9 20<x< 40 40<x< 60 60 <x< 80 29 42 26 80 < x< 100 14 a. Find the mean, median, mode, first quartile, third quartile and interquartile range for the following data. b. Calculate the mark required to gain a distinction if the top 10% of the students are awarded a distinction.
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