An electronics firm will not accept product from a supplier

An electronics firm will not accept product from a supplier if the mean resistance of a certain part is not 68 ohms. A random sample of 25 parts from a large shipment yields a mean of 70 and a standard deviation of 10 ohms. Which one of the following best decribes the null and alternative hypothesis that should be used to determine if the data provide sufficient evidence to decide whether to accept the shipment of parts?

A I only B II only C III only D IV only E V only F VI only

Solution