Overview Chance & Data

Question 1

A traveller is chosen at random. What is the probability they travel in Quarter 1 or 3?

Accepted Answer

49%

Question 2

A traveller is chosen at random. What is the probability they did not travel in the Quarter 4?

Accepted Answer

71%

Question 3

In which sport is a competitor more likely to weigh more than 100kgs?

Accepted Answer

Athletics - a large group is over 100kg horizontal line

Question 4

Use statistical reasons to justify why USA might expect 100 medals if it competed in 1980

Accepted Answer

There are spikes in medal totals for the host country, The long term trend for USA is increasing.

Question 5

From this random sample of competitors, is it possible to conclude that heights are different?

Accepted Answer

Yes, the medians are outside the boxes so athletics taller, Yes, despite overlap, the medians shift means heights differ

Question 6

Describe any unusual features in this graph

Accepted Answer

USA got almost 250 medals in 1904, There is a gap in 1980 when the USA did not compete

Question 7

Compare any significant features of the graph

Accepted Answer

Medians are outside the others box so athletics are older, The age Athletics competitors is shifted up the scale

Question 8

Predict how many medals the USA could have expected if they participated in the 1980 Olympics

Accepted Answer

100

Question 9

Which sport has the strongest relationship between height and weight?

Accepted Answer

Swimming stronger because points are closer to best fit line

Question 10

Explain which sports shown had the greatest number of competitors

Accepted Answer

Athletics- overall the bars are higher, so greater frequency

Question 11

Describe the relationship between height and weight for each sport

Accepted Answer

Swimming shows a strong, positive, linear relationship, Athletics shows a fairly weak, positive linear relationship

Questions 11