Daily Practice

Foundation

28th October 2025

5 questions · Foundation tier · 282 questions in this band

1
Skewness by Inspection
Describe, using the mean and median, how you could tell that a distribution is positively skewed without drawing a graph.
2
Percentiles
A cumulative frequency graph shows that a value of 18 corresponds to a cumulative frequency of 45 out of 60 total data points. Find the percentile.
3
Crude Rate and Rates of Change
A town of population 10,000 records 20 births in a year. Find the crude birth rate per 1000 people.
4
Spearman's Rank Interpretation
Two data sets give correlation coefficients rs = 0.6 and rs = -0.9. Which shows the stronger relationship?
5
Conditional Probability (Foundation)
A class has 12 boys and 8 girls. One student, a girl, leaves the room. A second student is then chosen at random from those remaining. Find P(second student chosen is a girl given the first was a girl).

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