Mathematics 9709/53 — May/June 2021
Cambridge AS Level · Probability & Statistics 1 · worked solutions for every part, with the mark scheme
7
questions
50
marks
75
minutes
Topics Discrete Random Variables · Representation of Data · Probability · The Normal Distribution · Permutations and Combinations
Q1Representation of DataFree sample
The heights in cm of 160 sunflower plants were measured. The results are summarised on the following cumulative frequency curve.
(a)1M
Use the graph to estimate the number of plants with heights less than 100 cm.
(b)2M
Use the graph to estimate the 65th percentile of the distribution.
(c)2M
Use the graph to estimate the interquartile range of the heights of these plants.
The rest of this paper
6 more questions- Q2Discrete Random Variables4M
- Q3Representation of Data5M
- Q4Probability · Discrete Random Variables6M
- Q5The Normal Distribution9M
- Q6Permutations and Combinations10M
- Q7Probability · Discrete Random Variables · The Normal Distribution11M
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