9.24 Fifteen resistors were randomly selected from the output of a process supposedly producing 10-ohm resistors. The

Question:

9.24 Fifteen resistors were randomly selected from the output of a process supposedly producing 10-ohm resistors. The 15 resistors actually showed a sample mean of 9.8 ohms and a sample standard deviation of 0.5 ohm. Find a 95%

confidence interval for the true mean resistance of the resistors produced by this process.

Assume resistance measurements are approximately normally distributed.

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