Daily Practice

Foundation

20th September 2025

5 questions · Foundation tier · 282 questions in this band

1
Correlation and Causation (Foundation)
Define correlation in your own words.
2
Risk (Foundation)
Out of 600 drivers who used a phone while driving, 24 had an accident that year, compared with 9 out of 900 drivers who did not use a phone. Calculate the risk of an accident for each group.
3
Skewness by Inspection
A distribution has mean = mode = median. What does this suggest about its shape?
4
Percentiles
Which percentile is the same as the median?
5
Crude Rate and Rates of Change
Explain why a crude rate is more useful than a raw total, such as the total number of deaths, when comparing two towns of different sizes.

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