Daily Practice

Foundation

9th October 2025

5 questions · Foundation tier · 282 questions in this band

1
Risk (Foundation)
Using your answers to the previous question, find the relative risk for phone users compared with non-users, and interpret it.
2
Skewness by Inspection
A shop's till receipts have mode 5 pounds, median 8 pounds, mean 15 pounds. State the type of skew and give a reason.
3
Percentiles
In a data set of 200 values, at what position, counting from the smallest, would you expect to find the 25th percentile?
4
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.
5
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.

You are looking at an earlier sheet. Today's sheet is the one that adds a day.

Your run is kept in this browser only, and there is no account.

Any date always gives the same five questions, so a sheet can be set again or shared. All of October 2025, including the monthly compilation PDF.