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  3. a simple random sample of 90 is drawn from a norma

A simple random sample of 90 is drawn from a normally distributed population and the...

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A simple random sample of 90 is drawn from a normally distributed population and the mean is found to be 138 with a standard deviation of 34 What is the 90 confidence interval for the population mean Use the table below to help you answer the question Confidence Level Z score 90 1 645 O 128 75 to 147 25 O 130 98 to 145 02 O 132 10 to 143 90 O 137 38 to 138 62 95 1 96 Remember the margin of error ME can be determined using the formula ME Z S n 99 2 58

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