Question: QUESTION 18 Construct a 95% confidence interval for the population mean, . Assume the population has a normal distribution. A random sample of n=9 lithium

QUESTION 18

  1. Construct a 95% confidence interval for the population mean, . Assume the population has a normal distribution. A random sample of n=9 lithium batteries has a mean life of 645 hours with a standard deviation of 31 hours. Round to the nearest tenth.

(621.2, 668.8)

(632.2, 657.8 )

(628.5, 661.5)

(604.0, 676.0)

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