7. Explain what is meant by this statement: There is not just one normal probability distribu-...

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7. Explain what is meant by this statement: "There is not just one normal probability distribu- tion but a 'family' of them." 8. List the major characteristics of a normal probability distribution. 9. The mean of a normal probability distribution is 500; the standard deviation is 10. a. About 68% of the observations lie between what two values? 12 b. About 95% of the observations lie between what two values? Haub c. Practically all of the observations lie between what two values? bility distributi 7. Explain what is meant by this statement: "There is not just one normal probability distribu- tion but a 'family' of them." 8. List the major characteristics of a normal probability distribution. 9. The mean of a normal probability distribution is 500; the standard deviation is 10. a. About 68% of the observations lie between what two values? 12 b. About 95% of the observations lie between what two values? Haub c. Practically all of the observations lie between what two values? bility distributi