Daily Practice

Higher

29th May 2026

5 questions · Higher tier · 360 questions in this band

1
Regression and the PMCC
A PMCC value of r = -0.2 is calculated. Describe the correlation.
2
Stratified Sampling (Higher)
A population has 100 men and 150 women (250 total). A stratified sample of 25 is required. How many women should be sampled?
3
Capture Recapture
25 deer are tagged and released. In a second sample of 50 deer, 5 are found to be tagged. Estimate the deer population.
4
Crude and Standardised Rates
A city had 350 births in a population of 70,000. Calculate the crude birth rate per 1000 people.
5
Conditional Probability (Higher)
A bag has 4 red and 6 green balls. One is drawn and not replaced. Given the first is red, how many balls remain in total, and how many are green?

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