Mathematics 9709/62 — February/March 2022
Cambridge A-Level · Probability & Statistics 2 · worked solutions for every part, with the mark scheme
7
questions
50
marks
75
minutes
Topics Sampling and Estimation · Hypothesis Tests · Linear Combinations of Random Variables · Continuous Random Variables · The Poisson Distribution
Q1Sampling and EstimationFree sample
The lengths, in millimetres, of a random sample of 12 rods made by a certain machine are as follows.
200 201 198 202 200 199 199 201 197 202 200 199
(a)3M
Find unbiased estimates of the population mean and variance.
(b)1M
Give a statistical reason why these estimates may not be reliable.
The rest of this paper
6 more questions- Q2Hypothesis Tests5M
- Q3Sampling and Estimation5M
- Q4Hypothesis Tests · Sampling and Estimation6M
- Q5Linear Combinations of Random Variables9M
- Q6Continuous Random Variables11M
- Q7The Poisson Distribution · Linear Combinations of Random Variables10M
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