French fries-normal distribution

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Reference no: EM1392241

The lengths of 45 French fries, randomly selected from a huge shipment, were measured and a mean length of 8.4 cm with standard deviation of 3.1 cm was found.

a. Construct a 95% confidence interval for the population mean length of a French fry.

b. Compute the number of French fries that would have to be sampled and measured to be 98% sure of being within 0.4 cm of the true mean.

Reference no: EM1392241

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