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The weights of aluminum castings produced by a process are normally distributed. A random sample of 5 castings is selected; the sample mean weight is
The weights of aluminum castings produced by a process are normally distributed. A random sample of 5 castings is selected; the sample mean weight is 2.21 pounds; and the sample standard deviation is 0.12 pound. The 98% confidence interval for the population mean casting weight is _________.
2.01 to 2.41
2.49 to 2.67
1.93 to 2.49
2.08 to 2.34
1.76 to 2.66
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