The following table gives data on monthly changes in the spot price of a commodity

and the futures price of a contract used to hedge it$.$ Use the data to calculate a minimum

variance hedge ratio. $($Do not make an adjustment for daily settlement.$)$

Spot price change

$+0\mathrm{.}55+0\mathrm{.}65-0\mathrm{.}25-0\mathrm{.}35+0\mathrm{.}79+0\mathrm{.}05+0\mathrm{.}15+0\mathrm{.}70-0\mathrm{.}51-0\mathrm{.}45$

Futures price change

$+0\mathrm{.}46+0\mathrm{.}53-0\mathrm{.}15-0\mathrm{.}45+0\mathrm{.}55-0\mathrm{.}07+0\mathrm{.}02+0\mathrm{.}75-0\mathrm{.}50-0\mathrm{.}42$