Daily Practice

Foundation

1st October 2024

5 questions · Foundation tier · 282 questions in this band

1
Estimated Mean from Grouped Data
Find the midpoint of the class interval 30-50.
2
Sampling Methods
A researcher wants a sample of 50 from a population of 500 using systematic sampling, with a random start of 4. List the first three people selected.
3
Collecting Data
State one advantage secondary data has over primary data for a project on rainfall over the last 50 years.
4
Comparing Data Sets
Data set X has a range of 12 and data set Y has a range of 5. Which data set is more consistent?
5
Combined Mean
Three groups have 8 items with mean 10, 12 items with mean 15, and 5 items with mean 20. Find the combined mean.

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