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Chapter 12: Problem 13
In Exercises 13-20, find the median for each group of data items. \(7,4,3,2,8,5,1,3\)
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Scores on a dental anxiety scale range from 0 (no anxiety) to 20 (extreme anxiety). The scores are normally distributed with a mean of 11 and a standard deviation of 4.Find the \(z\)-score for the given score on this dental anxiety scale. 5
The scores on a test are normally distributed with a mean of 100 and a standard deviation of 20.Find the score that is \(1 \frac{1}{2}\) standard deviations above the mean.
In Exercises 27-28, compute the mean, range, and standard deviation for the data items in each of the three samples. Then describe one way in which the samples are alike and one way in which they are different. Sample A: \(6,8,10,12,14,16,18\) Sample B: 6, 7,8,12,16, 17, 18 Sample C: 6, 6, 6, 12, 18, 18, 18
A sample of cereals indicates a mean potassium content per serving of 93 milligrams and a standard deviation of 2 milligrams. Write a description of what this means for a person who knows nothing about statistics.
A set of data items is normally distributed with a mean of 400 and a standard deviation of 50. Find the data item in this distribution that corresponds to the given z-score. \(z=-1.5\)
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