Bob keeps annual records of daily temperatures. In 1998 he found that the maximum daily temperature, in \(⁰C\), in March had a mean of \(7.8\) and a standard deviation of \(4.2\). In 2008 he found ...

Standard deviation is an important measure of spread or dispersion. It tells us how far, on average the results are from the mean. Therefore if the standard deviation is small, then this tells us that ...

We’re long-term subscribers to WARC and it’s a tool we use extensively. We use it to source case studies and best practice for the purposes of internal training, as well as for putting persuasive ...