11-10 Normal Distributions

If an outcome in a probability experiment can only take on whole number values, we say the outcome is discrete. If the outcome can take on any decimal value, we say the outcome is continuous.

In your notes, write D for each experiment with discrete outcomes and N for each experiment without nondiscrete (continuous) outcomes.

Exercises 2 - 7

In your notes, write D for each experiment with discrete outcomes and N for each experiment with nondiscrete (continuous) outcomes.

Exercises 2 - 7

The normal distribution describes experiments with lots of outcomes near some mean value, some more outcomes between 1 and 2 s.d. from the mean, and only a few outcomes more than 2 s.d. from the mean.

Complete Exercises 9 - 12 in your notes based on the bar graph.

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Problem 1

For a population of female European eels, the mean body length is 21.1 in. The standard deviation is 4.7 in. Complete Exercises 13 - 15 in your notes.

Hint: We did something like this in Problem 3 of section 11-7.

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Problem 2

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Problem 2

The scores on the Algebra 2 final are approximately normally distributed with a mean of 150 and a standard deviation of 15. What percentage of the students who took the test scored above 180? Try Exercises 1

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Problem 3