Constructing Normal Quantile Plots. In Exercises 17–20, use the given data values to identify the corresponding z scores that are used for a normal quantile plot, then identify the coordinates of each point in the normal quantile plot. Construct the normal quantile plot, then determine whether the data appear to be from a population with a normal distribution. Brain Volumes A sample of human brain volumes (cm3) is obtained from those listed in Data Set 8 “IQ and Brain Size” in Appendix B: 1027, 1029, 1034, 1070, 1079, 1079, 963, 1439.

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Asked Jan 19, 2020
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Constructing Normal Quantile Plots. In Exercises 17–20, use the given data values to identify the corresponding z scores that are used for a normal quantile plot, then identify the coordinates of each point in the normal quantile plot. Construct the normal quantile plot, then determine whether the data appear to be from a population with a normal distribution. 

Brain Volumes A sample of human brain volumes (cm3) is obtained from those listed in Data Set 8 “IQ and Brain Size” in Appendix B: 1027, 1029, 1034, 1070, 1079, 1079, 963, 1439.

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Step 1

The sample of human brain volumes is 1,027, 1,029, 1,034, 1,070, 1,079, 1,079, 963 and 1,439.

Arrange the data in an ascending order.

963, 1,027, 1,029, 1,034, 1,070, 1,079, 1,079 and 1,439

The z scores are obtained by finding the cumulative areas to the left of the corresponding sample values.

Step 2

The formulae to find the cumulative areas are,

Statistics homework question answer, step 2, image 1
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Step 3

Similarly, the value of cumulative areas for the remaining cumulativ...

Statistics homework question answer, step 3, image 1
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