Mathematics 9709/62 — February/March 2018

Cambridge A-Level · Probability & Statistics 1 · worked solutions for every part, with the mark scheme

questions

marks

minutes

Topics Representation of Data · Permutations and Combinations · Discrete Random Variables · The Normal Distribution · Probability

Q14MRepresentation of DataFree sample

There are 900 students in a certain year-group. An identical puzzle is given to each student and the time taken, $t$ minutes, to complete the puzzle is recorded. These times are summarised in the following frequency table.

Time taken, $t$ minutes	$t \le 3$	$3 < t \le 4$	$4 < t \le 5$	$5 < t \le 6$	$6 < t \le 8$	$8 < t \le 10$	$10 < t \le 14$
Frequency	120	180	200	160	110	80	50

On the grid, draw a cumulative frequency graph to represent the data. Use your graph to estimate the median time taken by these students to complete the puzzle.

cumulative_frequency_grid

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7 more questions

Q2Permutations and Combinations4M
Q3Probability6M
Q4Discrete Random Variables6M
Q5Representation of Data6M
Q6Permutations and Combinations6M
Q7The Normal Distribution8M
Q8Discrete Random Variables · The Normal Distribution10M

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