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2. Suppose the weights of potatoes follows approximately normal distribution with mean 5.3 oz. If we know that the 60 percentile weight is 9 oz,

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2. Suppose the weights of potatoes follows approximately normal distribution with mean 5.3 oz. If we know that the 60 percentile weight is 9 oz, then i) Find the standard deviation. Show your z formula and all work! (This part is Bonus ) ii ) Find the z-score for the weight 8 oz. Then, find the percent of values below it. Explain

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