Question: A laboratory scale is known to have a standard deviation of =0.006 grams in repeated weighings.If scale readings in repeated weighings are normally distributed, how

A laboratory scale is known to have a standard deviation of =0.006 grams in repeated weighings.If scale readings in repeated weighings are normally distributed, how many times must you weigh a specimen on this scale in order to have the length of the confidence interval be no larger than 0.002 grams with 95% confidence?

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