Understand and calculate the mean, median, mode, range and interquartile range (IQR) of a dataset, with and without technology.  mean: 𝑥̅ = ∑ 𝑥 𝑛  median: (𝑛+1 2)th data value

Question 1

Question 1

A wildlife conservation team records the number of koalas observed in a eucalyptus forest over seven consecutive monitoring days. The data collected is shown in the table below. Calculate the following statistics for this dataset: (a) the mean number of koalas observed [1 mark] (b) the median number of koalas observed [1 mark] (c) the range [1 mark] (d) the interquartile range (IQR) [1 mark]

Worked answer

🔒 Start free to see full answer

Question 2

Question 2

The number of visitors to a small museum on nine consecutive Saturdays is recorded in the table below. (a) Calculate the mean number of visitors. [1] (b) Determine the median number of visitors. [1] (c) Calculate the range of visitor numbers. [1]

Worked answer

🔒 Start free to see full answer

Question 3

Question 3

Calculate the interquartile range (IQR) for the dataset shown.

Worked answer

🔒 Start free to see full answer

Understand and calculate the mean, median, mode, range and interquartile range (IQR) of a dataset, with and without technology.  mean: 𝑥̅ = ∑ 𝑥 𝑛  median: (𝑛+1 2)th data value

Practise this objective

Practice questions for this objective

More in Making sense of data relating to a single statistical variable