Answer to Question #88424 in Statistics and Probability for Penelope Mahlangu

Question

Researchers at the European Centre for road Safety Testing are trying to find out how the age of cars
affects their braking capability. They test a group of ten cars of differing ages and find out the
minimum stopping distances that the cars can achieve. The results are set out in the table below:
Car Age (months) Minimum Stopping at 40 kilometres
per hour (metres)
A 9 28.4
B 15 29.3
C 24 37.6
D 30 36.2
E 38 36.5
F 46 35.3
G 53 36.2
H 60 44.1
I 64 44.8
J 76 47.2
Using information provided above to answer the following questions:
2.1 Draw a scatter diagram from the data. (11)
2.2 Compute Spearman’s correlation coefficient (rho) (12)
2.3 Compute Pearson’s correlation coefficient(r)

Answer 1

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