(a)[4]
Draw a histogram to show this information.
(b)[2]
Calculate an estimate of the mean time taken by these 200 players.
(c)[2]
Find the greatest possible value of the interquartile range of these times.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
The times needed by 200 players to complete a computer puzzle are set out in the table below: Time ($t$ seconds): $0 \leq t < 10$, $10 \leq t < 20$, $20 \leq t < 40$, $40 \leq t < 60$, $60 \leq t < 100$. Number of players: $16$, $54$, $78$, $32$, $20$.