Daily Practice

Foundation

5th November 2024

5 questions · Foundation tier · 282 questions in this band

1
Percentiles
In a data set of 200 values, at what position, counting from the smallest, would you expect to find the 25th percentile?
2
Crude Rate and Rates of Change
A city's population grows from 50,000 to 52,000 in one year. Find the percentage rate of change.
3
Spearman's Rank Interpretation
The Spearman's rank correlation coefficient between temperature and ice cream sales for 8 days is rs = 0.95. Describe the correlation.
4
Conditional Probability (Foundation)
A pack of 10 cards is numbered 1 to 10. One card is drawn and not replaced; it is even. A second card is then drawn. Find P(second card is even given the first card was even).
5
Estimating from Samples (Foundation)
A random sample of 50 packets of crisps from a production run of 8000 found 3 were underweight. Estimate how many packets in the whole run are underweight.

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