4.7 We are interested in the volatility of two shares, that is, how much the share prices fluctuate over time. We look for a financial platform on the Internet that provides the data and look at the daily closing prices for one week (e.g. https://www.finanzen.ch).

For the first share (Novartis) we get the following values: 16.03 CHF 70.19, 17.03 CHF 73.49, 18.03 CHF 72.02, 19.03 CHF 75.70, 20.03 CHF 74.00. For the second share (UBS) we get: 16.03 CHF 7.46, 17.03 CHF 7.76, 18.03 CHF 7.77, 19.03 CHF 8.73, 20.03 CHF 8.26. Calculate the range, the standard deviation, the variance and the coefficient of variation and decide which share had a higher volatility in the given period.