The age distribution of workers in a factor is as follows:   Marks   16-25 26-35 36-45 46-55 56-65 Number of students 12 29 32 17 10   (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.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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The age distribution of workers in a factor is as follows:

 

Marks

 

16-25

26-35

36-45

46-55

56-65

Number of students

12

29

32

17

10

 

(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

 

for the given data.

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