Daily Practice

Higher

24th October 2025

5 questions · Higher tier · 360 questions in this band

1
The Normal Distribution
A normal distribution has mean 100 and standard deviation 15. What range contains approximately 95% of the data?
2
The Binomial Distribution
A binomial variable X has n = 8 and p = 0.25. Find P(X = 2), giving your answer to 3 significant figures.
3
Quality Assurance and Control Charts
A sample mean is plotted just outside the warning limit on a control chart, but inside the action limits. What should the operator do?
4
Spearman's Rank Correlation
Using n = 5 and sum of d^2 = 10, calculate Spearman's rank correlation coefficient.
5
Spreadsheets and ICT (Higher)
State one disadvantage of relying on ICT and spreadsheets to process statistical data.

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