Foundation June 2018 Paper 3 Q19

EdexcelCurrent spec3 marksScatter Diagrams & Correlation

19 The scatter diagram shows information about 12 girls.
It shows the age of each girl and the best time she takes to run 100 metres.

Scatter diagram of time in seconds (10 to 17) against age in years (9 to 15) for 12 girls; the times generally fall from about 16.5 seconds at age 9.8 to about 12.6 seconds at age 13.4
(a) Write down the type of correlation. (1)

Kristina is 11 years old.
Her best time to run 100 metres is 12 seconds.

The point representing this information would be an outlier on the scatter diagram.

(b) Explain why. (1)

Debbie is 15 years old.
Debbie says,

“The scatter diagram shows I should take less than 12 seconds to run 100 metres.”

(c) Comment on what Debbie says. (1)
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