Daily Practice

Higher

7th February 2025

5 questions · Higher tier · 360 questions in this band

1
Estimated Mean from Grouped Data
A class interval 0-10 has frequency 6. Find frequency x midpoint.
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
Give one advantage of using a questionnaire to collect data.
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
A class of 15 students has a mean score of 30. When combined with another class of 25 students, the combined mean of all 40 students is 40. Find the mean score of the second class.

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