Daily Practice

Foundation

22nd March 2026

5 questions · Foundation tier · 282 questions in this band

1
Experimental Design
What is meant by a control variable?
2
Median Quartiles and IQR
For the ordered data 2, 4, 5, 7, 8, 9, 11, 13, 14, find the lower quartile (Q1) and upper quartile (Q3).
3
Index Numbers
The price of milk was 0.80 pounds in the base year and 0.92 pounds this year. Find the index number for milk this year.
4
Frequency Tables and Tally Charts
The frequencies for four categories are 8, 5, 12, 3. What is the total number of data items?
5
Time Series and Moving Averages
Find the 3-point moving average of 10, 14, 18.

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