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I need help with #5 5. Customer ratings for a DeWalt 20V Max cordless power tool are given in the table. Find: (4 pts) Stars

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I need help with #5

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5. Customer ratings for a DeWalt 20V Max cordless power tool are given in the table. Find: (4 pts) Stars (x) Ratings P(x) 5 71.3% A 16.2% 3.8% 2.7% 6.0% a ) Expected value (mean average) b) Standard deviation (SD = sigma) c ) Low and High Normal limits

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