Daily Practice

Foundation

29th June 2024

5 questions · Foundation tier · 282 questions in this band

1
Estimated Mean from Grouped Data
The table shows ages, in years, of 50 people at a gym: 10-20 (freq 6), 20-30 (freq 18), 30-40 (freq 16), 40-50 (freq 10). Estimate the mean age.
2
Sampling Methods
A population has 200 members and a sample of 20 is needed using systematic sampling. Find the sampling interval.
3
Collecting Data
State whether interviewing shoppers face-to-face about their favourite supermarket is primary or secondary data collection.
4
Comparing Data Sets
The mean rainfall in April was 45 mm with a range of 20 mm; in May it was 45 mm with a range of 8 mm. Compare April and May.
5
Combined Mean
Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.

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