Question

. The table shows the ages, to the nearest year, of persons who visited the clinic during a particular week

Age (yrs) Number of persons Cumu freq
40 – 49 4 4
50 – 59 11 15
60 – 69 20 ---
70 – 79 12 ---
80 - 89 3 50


a) Copy and complete the table to show the cumulative
frequency.

b) Using a scale of 2 cm = 10 years on x axis and 1cm=5persons on they axis, draw the cumulative curve for the data.
c) use the graph to estimate (1) the median age (11) the probability that a vistor to the clinic was 75 years or younger.

Answer 1

which part do you need help with?

Answer 2

c and b

Answer 3

so start at the bottom left (origin)
move left 2cm for every 10 years than up one for every 5 people

Answer 4

so it should be flat until you hit 40 then up four cm then over 2 (to 50) then up 3cm (15 people)

Answer 5

something like that
but yours will be to scale