Daily Practice

Foundation

11th March 2025

5 questions · Foundation tier · 282 questions in this band

1
Experimental Design
A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
2
Median Quartiles and IQR
Two classes have the same median test score. Class A has IQR = 6 and Class B has IQR = 15. Which class's scores are more consistent, and why?
3
Index Numbers
A base year value is 40 and this year's value is 50. Find the index number.
4
Frequency Tables and Tally Charts
A frequency table for test scores out of 10 shows: score 6 has frequency 5, score 7 has frequency 8, score 8 has frequency x, score 9 has frequency 3, and the total frequency is 25. Find x.
5
Time Series and Moving Averages
A series of 4-point moving averages is 45, 48, 52, 55. Describe the trend shown by these values.

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 March 2025, including the monthly compilation PDF.