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# Length of the Earthworm

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The lengths of adult earthworms are normal with mean 8.6cm. and standard deviation 1.6cm. 40 adult earthworms are chosen at random. Approximate the probability that at lease 18 of them are less than 4.5cm.long.

##### Solution Summary

The solution discusses the length of the earthworm and the standard deviation.

##### Terms and Definitions for Statistics

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This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

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