Mathematics 0580 · IGCSE · Scatter diagrams

Scatter diagrams — practice question

(a(i))[1]

Complete the table by working out how many males in the survey are right-handed.

(a(ii)(a))[1]

Using these results, write down the probability that a male picked at random is left-handed.

(a(ii)(b))[1]

Using these results, write down the probability that a person chosen at random from the left-handed group is female.

(a(ii)(c))[1]

Using these results, write down the probability that a randomly chosen person is right-handed.

(a(iii))[2]

Find the median age for these people.

(b)[3]

Work out the mean number of people in a household.

(c(i))[2]

Complete the scatter diagram. The first ten points have already been plotted for you.

(c(ii))[1]

One student has a high multiplication score and a low spelling score. Put a ring around this point on the scatter diagram.

(c(iii))[1]

What correlation does this scatter diagram show?

(c(iv))[1]

On the scatter diagram, draw a line of best fit.

(c(v))[1]

Another student, Kim, achieved 45 in the spelling test but was absent for the multiplication test. Use your line of best fit to estimate Kim’s multiplication-test score.

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