G. Wayne Marino investigated some of the variables related to "fast starts," the acceleration and speed of a hockey player from a stopped position. Sixty-nine hockey players, varsity and intramural, from the University of Illinois were included in the experiment. Each player was required to move as rapidly as possible from a stopped position to cover a distance of 6 meters. The means and standard deviations of some of the variables recorded for each of the 69 skaters are shown in the table:

a. Give the formula that you would use to construct a 95% confidence interval for one of the population means (e.g., mean time to skate the 6-meter distance).
b. Construct a 95% confidence interval for the mean time to skate. Interpret this interval.

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Mean SD 75.270 9.470 1110 205 3.310 390 Weight (kilograms) Stride Length (meters) Stride Rate (strides/second) Average Acceleration (meters/second) 2962 529 Instantaneous Velocity (meters/second) 5.753 892 Time to Skate (seconds) 1.953 131