The following data represent the rate of return of United Technologies stock for 11 months, compared with the rate of return of the Standard and Poors Index of 500 stocks. Both are in percent.

What is the mean rate of return for United Technologies stock if the rate of return of the S&P 500 is 4.2%?

Month Rate of Return of S&P500 Rate of return of United Technologies April 2020 1.48 1.82 May 2020 -8.20 -9.57 June 2020 -5.39 -3.67 July 6.88 9.53 August 2020 -4.74 -7.72 Sept 8.76 9.24 Oct 2020 3.69 4.97 Nov -0.23 1.24 Dec 2020 6.53 4.59 January 2021 2.26 3.27 February 2021 3.20 3.28