The owner of a smart watch would like to estimate the mean number of steps they take per day. To do so, they select a random sample of 30 days from the previous year's data and record the number of steps they took on each
of those days. The mean number of steps taken per day was 8,575 with a standard deviation of 2,125 steps. What
is the value of the standard error of the mean?
O 70.833
O 387.970
O 394.603
O 2.125