Daily Practice

Higher

17th February 2025

5 questions · Higher tier · 360 questions in this band

1
Box Plots from Cumulative Frequency and Outliers
A cumulative frequency table gives Q1 = 18, median = 25, Q3 = 34 for the ages of 60 people at a conference. Calculate the IQR and state the upper outlier boundary.
2
Weighted and Geometric Mean
Find the geometric mean of 2, 4 and 8.
3
Pilot Surveys (Higher)
A pilot survey question asks: do you agree that the new park is a great improvement? Every pilot respondent answered yes. Identify the flaw and rewrite the question so it would work better in the main survey.
4
Weighted and Chain Base Index Numbers
An item cost 40 pounds in the base year and has an index number of 115 this year. Find its price this year.
5
Recognising Misleading Graphs (Higher)
Why is starting a bar chart's vertical axis at a value other than zero considered misleading?

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