Daily Practice

Foundation

9th July 2024

5 questions · Foundation tier · 282 questions in this band

1
Comparing Data Sets
Shop A's daily sales have an IQR of 40 pounds and Shop B's have an IQR of 15 pounds. Which shop has more variable daily sales?
2
Combined Mean
Group A has 10 items with mean 50. Group B has 5 items with mean 80. Find the combined mean.
3
Designing Questionnaires and Surveys
A survey question offers the response options 'Never, Sometimes, Always'. State one improvement that could be made.
4
Experimental Design
What is meant by a control variable?
5
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).

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