Daily Practice

Foundation

9th July 2026

5 questions · Foundation tier · 282 questions in this band

1
Percentiles
What percentage of data lies below the 40th percentile?
2
Crude Rate and Rates of Change
A country of population 2,000,000 records 3,000 deaths in a year. Find the crude death rate per 100,000 people.
3
Spearman's Rank Interpretation
The Spearman's rank correlation coefficient between hours spent watching TV and test score is rs = -0.4. Describe the strength and direction of the correlation.
4
Conditional Probability (Foundation)
A box has 4 chocolate and 6 plain biscuits. One biscuit is eaten (it was chocolate), then a second is taken at random. Find P(second is chocolate given first was chocolate).
5
Estimating from Samples (Foundation)
A sample of 80 light bulbs from a batch of 2000 found 4 were faulty. Estimate the number of faulty bulbs in the whole batch.

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