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ultra batteries is a company that produces a new type of battery that claims a single charge will last more than 30 days. A random

ultra batteries is a company that produces a new type of battery that claims a single charge will last more than 30 days. A random sample of 65 ultra batteries is taken and the number of days it lasts on a single charge is recorded. Using the data contained in tab days on a single charge determine the following sample mean

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