Question: An experimenter would like to construct a two-sided 95% confidence interval for the difference between the average resistance of two types of copper cable with

An experimenter would like to construct a two-sided 95% confidence interval for the difference between the average resistance of two types of copper cable with a length no larger than L0 = 1.0 ohms. If the experimenter feels that the standard deviations of the resistances of either type of cable are no larger than 1.2 ohms, what (equal) sample sizes would you recommend be obtained from the two types of copper cable?

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