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2.5 Data presentation and interpretation

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Question 12
58%

The distance travelled by 100 people to an event is summarised below.

Distance (nearest mile)Frequency
0 – 94
10 – 1919
20 – 2941
30 – 3926
40 – 499
50 – 591

You may use: ∑fx=2651\sum fx = 2651∑fx=2651 and ∑fx2=80434.25\sum fx^2 = 80434.25∑fx2=80434.25

a.

Use linear interpolation to estimate the median distance.

[2]
b.

Estimate the mean distance.

[2]
c.

Estimate the standard deviation.

[2]

2.5 Data presentation and interpretation Questions

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