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From a random sample of 75 business days from January 4th, 2010, through February 24th, 2017,...

From a random sample of 75 business days from January 4th, 2010, through February 24th, 2017, Russian silver prices had a mean of $3,338.48 and σ= $205.61 was the population standard deviation of silver prices. Construct a 90% confidence interval for the true population mean μ and interpret this interval.

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from above: 90% confidence interval for the true population mean μ and interpret this interval

=3309.42 ; 3387.54

we are 90% confident that true population mean of Russian silver prices falls between 3309.42 and 3387.54

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