Mathematics 0580 · IGCSE · Averages and measures of spread

Averages and measures of spread — practice question

There are 70 people, and each one takes a driving test. Each person keeps trying the test until they pass. The table gives the results.
(a(i))[1]

State the mode.

(a(ii))[3]

Calculate the mean value.

(a(iii))[1]

Jules claims that the median is 3.5. Show that his statement is wrong.

(b(i))[1]

What type of correlation does the scatter diagram show?

(b(ii))[1]

Choose one of these people at random. Calculate the probability that this person had 5 or more attempts.

(b(iii))[1]

Sketch a line of best fit on the scatter diagram.

(b(iv))[1]

A different person had 15 lessons. Estimate how many attempts they made.

Worked solution & mark scheme

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