## Statistics (12th Edition)

$x̅_{1} = \frac{93 + ...... + 86}{7} = 89.857$ $x̅_{2} = \frac{118 + ...... + 98}{8} = 99.625$ Difference of means will give point estimate: $x̅_{1} - x̅_{2} = 89.857 - 99.625 = -9.768$