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The diameter of a brand of tennis balls is approximately normally? distributed, with a mean of...

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Basic Math

The diameter of a brand of tennis balls is approximatelynormally? distributed, with a mean of 2.58 inches and a standarddeviation of 0.03 inch. A random sample of 11 tennis balls isselected.

The probability is 69% that the sample mean will bebetween what two values symmetrically distributed around thepopulation? mean? (Round to two decimal places).

The lower bound is ___ inches, the upper bound is ___inches.

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