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Determine the sample size required to ensure that we can be 90% condent that u (population mean}I is within 1.21 (units) of the estimate x-bar.

Determine the sample size required to ensure that we can be 90% condent that u (population mean}I is within 1.21 (units) of the estimate x-bar. (Given that 0' = 11) Q 133 Q 39 0 224 Q 201 O 169

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