A company produces a resistor

A company produces a resistor that is designed to have a mean of 100 ohms and a standard deviation of 2 ohms. There is some evidence that suggests the mean is not being met, although the target value for the standard deviation appears to be very close to the actual deviation. A two-sided confidence interval for the mean is to be constructed, but one member of the team who designed the resistor wants to be able to estimate the mean with a maximum error of estimation of 0.5 ohm with probability .95. Determine the number of observations that should be used in constructing the 95% confidence interval.

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