Question

A study recorded the amount of oil recovered from the $64$ wells in an oil field, in thousands of barrels. Here are descriptive statistics for that set of data from statistical software.

Based on the summary statistics, is the distribution of amount of oil recovered from the wells in this field approximately Normal? Justify your answer.

Short answer

Not approximately normal.

Step-by-step solution

Given information

			Descriptive Statistics Oilprod
Variable	N	Mean	Median	StDev	Min	Max	Q1	Q3
Oilprod	64	48.25	37.80	40.24	2.00	204.90	21.40	60.75

Explanation

The mean is significantly bigger than the median, showing that the distribution is right-skewed because any large or small data values effect the mean far more than the median. Their minimum and maximum values are $2$and $204.90$respectively, indicating that the minimum value is substantially closer to the mean and median than the maximum value of $204.90$The distribution is not approximately normal because it is right-skewed where the normal distribution is symmetric.