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ScotlandStatisticsQuick questions

Data Analysis and Modelling

Quick questions on Exploratory data analysis: measures of location, dispersion, skewness and boxplots - SQA Advanced Higher Statistics

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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A sample has ∑x=90\sum x = 90, ∑x2=1044\sum x^2 = 1044 and n=9n = 9. Find the sample variance. [2 marks]
What is q2?
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State which measure of spread you would quote for clearly skewed data, and why. [1 mark]

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