A sample of 21 independent observations is taken from a normal distribution of unknown mean u but known variance o= 63.92. The sample mean is 34.15 and the sample variance is 54. What is the width of the 98% confidence interval for u? Give your solution accurate to 4 decimal places. Answer: Check Next page ious page P Type here to search hp

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A: It is given that the mean is 52 and the population standard deviation is 12.9.

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