Daily Practice

Foundation

16th May 2025

5 questions · Foundation tier · 282 questions in this band

1
Median Quartiles and IQR
A data set has Q1 = 22 and Q3 = 35. State the interquartile range and explain what it measures.
2
Index Numbers
An index number is 140 with a base value of 20. Find this year's value.
3
Frequency Tables and Tally Charts
Using the survey in the previous question (Red 6, Blue 9, Green 4, Yellow 5), which colour is the mode?
4
Time Series and Moving Averages
Find the 3-point moving average of 14, 18, 20.
5
Grouped Frequency Tables
A grouped frequency table has intervals of unequal width, 0 <= x < 10 and 10 <= x < 40. Explain why this could make the table misleading when drawing a histogram.

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