Students collected eight length measurements during a mathematics lab. The mean measurement was 46.3 cm, and the deviations of seven individual measurements were 0.8 cm, - 0.4 cm, 1.6 cm, 1.1 cm, -1.2 cm, -0.3 cm, and -1.0 cm.
a. What were the original eight measurements collected?
b. Find the standard deviation of the original measurements.
c. Which measurements are more than one standard deviation above or below the mean?