The following spreadsheet contains monthly returns for Cola Co. and Gas Co. for

2013

Using these data, estimate the average monthly return and the volatility for each stock.

Cola Co. Gas Co. January 0.0280 0.0590 February 0.0300 -0.0150 March -0.0180 -0.0130 April 0.0470 0.0250 May -0.0060 -0.0170 June 0.1110 0.1440 July 0.0160 0.0930 August -0.0050 -0.0280 September -0.0500 -0.0120 October -0.0140 0.0000 November 0.0150 0.1200 December -0.0070 0.0300