# Question

(a) What does a z-score indicate?

(b) Why are z-scores important?

(b) Why are z-scores important?

## Answer to relevant Questions

In an English class last semester, Foofy earned a 76 (X = 85, SX = 10). Her friend, Bubbles, in a different class, earned a 60 (X = 50, SX = 4). Should Foofy be bragging about how much better she did? Why? Which z-score in each of the following pairs corresponds to the lower raw score? (a) z = +1.0 or z = +2.3; (b) z = -2.8 or z = -1.7; (c) z = - .70 or z = - .20; (d) z = 0.0 or z = -2.0. Suppose you own shares of a company’s stock, the price of which has risen so that, over the past ten trading days, its mean selling price is $14.89. Over the years, the mean price of the stock has been $10.43 (CX = $5.60.) ...What is the difference between the normal distributions we’ve seen in previous chapters and (a) a z-distribution and (b) a sampling distribution of means? Poindexter sees the data in question 12d and concludes, “We should stop people from moving into bear country so that we can preserve our bear population.” What is the problem with Poindexter’s conclusion?Post your question

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