Mathematics (Linear) - 1ma0 Frequency Tables Worksheet - Edexcel Gcse Page 8
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89. Marcus collected some pebbles.
He weighed each pebble.
The grouped frequency table gives some information about weights.
Weight (w grams)
Frequency
50 w < 60
5
60 w < 70
9
70 w < 80
22
80 w < 90
27
90 w < 100
17
(a)
Work out an estimate for the mean weight of the pebbles.
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(3)
(b)
Write down the modal class interval.
..............................................
(1)
(c)
Find the class interval that contains the median.
..............................................
(2)
(d)
Why is your answer to part (a) and estimate?
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(1)
(7 marks)
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