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I hope the solution Time left 0:57:13 A random sample of size n is taken from a normal population with variance (9), how large must

I hope the solution

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Time left 0:57:13 A random sample of size n is taken from a normal population with variance (9), how large must the sample size (n ) be so that the length of 98% confidence interval for the population mean is 3 O 4 O

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