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Chapter 2: Q.13 (page 139)

A study recorded the amount of oil recovered from the 64wells in an oil field. Here are descriptive statistics for that set of data from Minitab

Short Answer

Expert verified

The data has a right-skewed distribution. As a result, the data is not normally distributed.

Step by step solution

01

Given Information

A study recorded the amount of oil recovered from the 64wells in an oil field.

We have to describe statistics for that set of data from Minitab

02

Box Plot

For clear understanding, we plot a Box plot from the given descriptive statistics

03

Explanation

As demonstrated in the summary data and box plot above, the mean is greater than the median value. The distance between the lowest and median values is also shorter than the distance between the highest and median values, as can be seen. As a result, the data distribution is right-skewed. We can deduce that the data in question is not normally distributed since we know that data with a normal distribution has a symmetrical shape.

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Most popular questions from this chapter

Use Table A to find the value zfrom the standard Normal distribution that satisfies each of the following conditions. In each case, sketch a standard Normal curve with your value of zmarked on the axis.

5. 45%of all observations are greater than z.

Use Table A in the back of the book to find the proportion of observations from a standard Normal distribution that fall in each of the following regions. In each case, sketch a standard Normal curve and shade the area representing the region.

z<1.39

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