The table below shows the marks scored by forty form 4 students in a mathematics class a) Using an assumed mean score of 55, calculate the...

The table below shows the marks scored by forty form 4 students in a mathematics class

a) Using an assumed mean score of 55, calculate the mean of the data
b) Calculate the lower quartile
c) On the grid provided, draw the cumulative frequency curve to represent the above distribution
d) From the graph estimate
i) The 5th decile
ii) Range of marks of the middle 80% of the students

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(d)(i) 5^th decile = 51.5
(ii) Range of middle 80%
= 25.5 = marks = 90.5

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Kavungya answered the question on November 15, 2019 at 12:57

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