Daily Practice

Higher

20th August 2024

5 questions · Higher tier · 360 questions in this band

1
Histograms and Frequency Density
A class interval 10-30 (width 20) has frequency density 3. Find the frequency.
2
Comparative and Proportional Pie Charts
Two comparative pie charts have totals of 18 and 72. If the pie chart for the total of 18 has radius 2.5 cm, find the radius of the other pie chart.
3
Percentiles and Interpercentile Range
In a data set of 40 values arranged in order, which position corresponds to the 25th percentile?
4
Estimating from Samples (Higher)
Student A estimates the dandelions on a 500 square metre field using five 1 square metre quadrats, counting 3, 5, 4, 6 and 2 dandelions. Student B uses twenty 1 square metre quadrats with a mean of 4.2 dandelions per quadrat. Whose estimate is likely to be more reliable, and what is Student B's estimate for the whole field?
5
Skewness
A distribution has mean 62 and median 55. What type of skew does this suggest?

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