Daily Practice

Foundation

21st September 2025

5 questions · Foundation tier · 282 questions in this band

1
Spearman's Rank Interpretation
The Spearman's rank correlation coefficient between the age of a used car and its price is rs = -0.88. Describe the correlation.
2
Conditional Probability (Foundation)
In a survey of 40 students, 25 like Maths. Of those 25, 18 also like Science. Find P(likes Science given likes Maths).
3
Estimating from Samples (Foundation)
A garden centre sampled 45 out of 3000 trees and found 40 had survived the winter. Estimate how many of the 3000 trees survived the winter.
4
Spreadsheets and ICT (Foundation)
A spreadsheet shows the formula =SUM(F1:F5)/COUNT(F1:F5) in cell F6. What statistical measure does this formula calculate?
5
Stratified Sampling (Foundation)
A factory has 400 workers: 160 in production, 120 in packing and 120 in admin. A stratified sample of 50 workers is needed. Find how many should be sampled from packing.

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 September 2025, including the monthly compilation PDF.