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Find the level of confidence that whiteboards

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Reference no: EM132012141

How would I find the level of confidence that whiteboards are longer than their blackboards if a 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.

Reference no: EM132012141

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