The table below shows the examination results of 100 students as a percentage Exam Result (%) Frequency 0-9 10-19 20-29 12 30-39 10 40-49 12 50-59 27

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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The table below shows the examination results of 100 students as a percentage
Exam Result (%)
Frequency
0-9
3
10-19
20-29
12
30-39
10
40-49
12
50-59
27
60-69
23
70-79
3
80-89
2
90-99
a) What is the class width?
(b) What is the lower boundary of the modal class?
(c) Construct a cumulative frequency table and draw (on graph paper) a cumulative frequency graph.
(d) Use your cumulative frequency diagram to estimate
(i) the median value
(ii) the inter-quartile range
Transcribed Image Text:The table below shows the examination results of 100 students as a percentage Exam Result (%) Frequency 0-9 3 10-19 20-29 12 30-39 10 40-49 12 50-59 27 60-69 23 70-79 3 80-89 2 90-99 a) What is the class width? (b) What is the lower boundary of the modal class? (c) Construct a cumulative frequency table and draw (on graph paper) a cumulative frequency graph. (d) Use your cumulative frequency diagram to estimate (i) the median value (ii) the inter-quartile range
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