A certain chalkboard manufacture specifies that their chalkboards have an average length of 72 inches with a standard deviation of 1 inch, and their | Cheap Nursing Papers
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A certain chalkboard manufacture specifies that their chalkboards have an average length of 72 inches with a standard deviation of 1 inch, and their

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A certain chalkboard manufacture specifies that their chalkboards have an average length of 72 inches with a standard deviation of 1 inch, and their whiteboards have an average length of 75 inches with standard deviation of 2 inches,. To what level of confidence can they claim that their whiteboards are longer than their blackboards.

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