Daily Practice

Foundation

27th April 2025

5 questions · Foundation tier · 282 questions in this band

1
Experimental Design
In a medicine trial, half the patients receive the real drug and half receive a dummy pill, and neither the patients nor the doctors know who received which until after results are recorded. What is this type of trial called, and why is it used?
2
Median Quartiles and IQR
Find the median of: 4, 7, 9, 12, 15.
3
Index Numbers
An item has an index number of 88 compared to its base year. State whether the value has increased or decreased, and by what percentage.
4
Frequency Tables and Tally Charts
The number of pets owned by 15 households, recorded as collected, is: 0,1,2,1,0,3,1,2,0,1,1,2,0,1,2. Complete a frequency table for the number of pets and state the total frequency.
5
Time Series and Moving Averages
What does a moving average smooth out in seasonal data, and what does the result reveal?

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