Daily Practice

Higher

2nd May 2025

5 questions · Higher tier · 360 questions in this band

1
Estimated Mean from Grouped Data
Find the midpoint of the class interval 10-20.
2
Sampling Methods
A gym has 900 members. A sample of 45 is needed using systematic sampling, with a random start of 12. Find the 4th person selected.
3
Collecting Data
A question asks: 'Don't you agree that the new bus timetable is an improvement?' State what is wrong with this question.
4
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?
5
Combined Mean
Group A has 10 items with mean 50. Group B has 5 items with mean 80. Find the combined mean.

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