Daily Practice

Foundation

31st August 2024

5 questions · Foundation tier · 282 questions in this band

1
Skewness by Inspection
A data set has mean 12, median 12, mode 12. Describe its skew.
2
Percentiles
What percentage of data lies below the 40th percentile?
3
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.
4
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.
5
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).

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