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cumulative frequency number of students 80 70 60 50 40 30 20 10 Boundary : 9.5 14.5 19.5 24.5 29.5 34.5 39.5 The sample size
cumulative frequency number of students 80 70 60 50 40 30 20 10
Boundary : 9.5 14.5 19.5 24.5 29.5 34.5 39.5
The sample size is
. Round answer to the nearest ten.
(b) The first class interval is
-. Caution: Class interval, not class boundary, is required.
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