Question

total oil recovered (thousands of barrels)
(a) the mean amount of total oil recovered is 50.395 thousand barrels and the standard deviation of the total oil recovered is 28.285 thousand barrels. interpret the standard deviation.

Explanation:

The standard deviation of 28.285 thousand barrels indicates the average amount by which the total oil - recovered values deviate from the mean of 50.395 thousand barrels. A relatively large standard deviation (in relation to the mean) suggests that the amounts of total oil recovered vary quite a bit from one data - point to another.

Answer:

The standard deviation of 28.285 thousand barrels represents the average amount by which the individual amounts of total oil recovered differ from the mean amount of 50.395 thousand barrels.