Mean: To find the mean, we need to multiply each time by its frequency, sum the products, and then divide by the total frequency.
Mean = $\frac{(7)(10) + (8)(5) + (9)(8) + (10)(9) + (11)(3) + (12)(4) + (13)(2) + (14)(1)}{10 + 5 + 8 + 9 + 3 + 4 + 2 + 1} = \frac{70
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