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A Major department store chain is having an end of season sale on refrigerators. The number of refrigerators sold during this sale at a sample

A Major department store chain is having an end of season sale on refrigerators. The number of refrigerators sold during this sale at a sample of ten stores was fifty nine.

A. Is their evidence that a average of more than 50 refrigeators were sold during this sale? use alfa

=0.05

B. What assumption is necessary to perform this test?

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