Daily Practice

Higher

14th February 2025

5 questions · Higher tier · 360 questions in this band

1
The Normal Distribution
A normal distribution has mean 50 and standard deviation 5. What range of values contains approximately 68% of the data?
2
The Binomial Distribution
A fair coin is tossed 3 times. Find the probability of getting exactly 2 heads.
3
Quality Assurance and Control Charts
A process has a target mean of 100 g and a standard deviation of 3 g. Find the upper and lower warning limits (mean plus or minus 2 sd).
4
Spearman's Rank Correlation
A calculation gives Spearman's rank correlation coefficient of -0.9. Describe what this shows about the relationship between the two rankings.
5
Spreadsheets and ICT (Higher)
Which spreadsheet function would you use to find the mean of the values in cells A1:A20?

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