Daily Practice

Foundation

5th May 2024

5 questions · Foundation tier · 282 questions in this band

1
Median Quartiles and IQR
For the ordered data 6, 9, 11, 14, 16, 18, 20, 23, 25, 28, find the interquartile range.
2
Index Numbers
A cost index for electricity, relative to the same base year, was 120 in 2021 and 150 in 2023. Find the percentage increase in the cost of electricity from 2021 to 2023 (not from the base year).
3
Frequency Tables and Tally Charts
A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?
4
Time Series and Moving Averages
Find the 4-point moving average of 8, 12, 16, 20.
5
Grouped Frequency Tables
Why must class intervals in a grouped frequency table not overlap?

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