Daily Practice

Higher

28th February 2025

5 questions · Higher tier · 360 questions in this band

1
Histograms and Frequency Density
A frequency table has intervals 0-10 (frequency 15) and 10-15 (frequency 20). Calculate the frequency density for each.
2
Comparative and Proportional Pie Charts
Two pie charts represent totals of 40 and 160. If the smaller chart has radius 2 cm, find the radius of the larger chart.
3
Percentiles and Interpercentile Range
A cumulative frequency graph shows 60 values. Which position corresponds to the 80th percentile?
4
Estimating from Samples (Higher)
A quality-control sample of 40 bottles from a batch of 5000 finds the mean volume per bottle is 498 ml. Estimate the total volume, in litres, of the whole batch.
5
Skewness
A box plot has a short whisker on the left of the box and a long whisker on the right, with the median line close to the left edge of the box. What type of skew is this?

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