Question: Using the sample data from Exercise 1, find the z score corresponding to the prediction error of 0 min. Is that prediction error significantly low

Using the sample data from Exercise 1, find the z score corresponding to the prediction error of 0 min. Is that prediction error significantly low or high? Why or why not?
Exercise 1
4 -7 0 1 -1 1 -4 -7 22 7 -5 1

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