Daily Practice

Higher

25th September 2024

5 questions · Higher tier · 360 questions in this band

1
Histograms and Frequency Density
A histogram bar has height (frequency density) 2.5 and covers the interval 0-8. Find the frequency it represents.
2
Comparative and Proportional Pie Charts
In a pie chart for Class A (30 pupils), 12 pupils chose football. Find the sector angle for football.
3
Percentiles and Interpercentile Range
Weekly household spending for 40 households has cumulative frequencies: up to 50 pounds, 10; up to 100 pounds, 25; up to 150 pounds, 35; up to 200 pounds, 40. Estimate the 75th percentile.
4
Estimating from Samples (Higher)
Explain why a sample of 10 students' shoe sizes is unlikely to give a reliable estimate of the mean shoe size of a school of 1200 students.
5
Skewness
A distribution has mean 40 and median 40. What type of skew does this suggest?

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