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the following set of data was generated by a random sample from a normal population: 121.331...

the following set of data was generated by a random sample from a normal population:

121.331

123.370

118.902

118.454

117.256

118.579

117.690

118.648

127.977

123.846

Given the sample average x̄= 120.605 and that the population standard deviation is known to be σ=3.5 , construct an 85% confidence interval for the population mean μ

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