Dave the jogger runs the same route every day about
Dave the jogger runs the same route every day (about 2.2 miles). On 18 consecutive days, he recorded the number of steps using a pedometer. The results were
(a) Construct a 95 percent confidence interval for the true mean number of steps Dave takes on his run.
(b) What sample size would be needed to obtain an error of ±20 steps with 95 percent confidence?
(c) Using Excel, plot a line chart of the data. What do the data suggest about DaveSteps the pattern over time?
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