Here are summary statistics that describe the distribution of the number of steps taken by a group of teachers on a randomly selected school day as recorded by a Fitbit. n mean SD min Median O3 max 14 11,278 1,089.4 9,250 10,083 11,025 13,235 13,761 What is the z-score for a teacher who took 10,250 steps? Interpret this value. a. z=-0.944. This teacher's steps for the day were 0.944 standard deviations below the mean of 11,278 steps. b. z=0.944. This teacher's steps for the day were 0.944 standard deviations above the mean of 11,278 steps. c. z=-0.944. This teacher's steps for the day were within 0.944 standard deviations of the mean of 11,278 steps. d. None of these are correct