Using Sample 2, construct 95% two-sided confidence interval for the mean(assume o? is known and equal to the o? of the COVID-19 data set of the NEW Daily Cases in the CBA-Task1) - Compare the width of the intervals in Part (1) and (2) Using Sample 1, construct 99% two-sided confidence interval for the variance (assume o? is Unknown) Using Sample 2, construct 99% two-sided confidence interval for the variance(assume o2 is Unknown) - Compare the width of the intervals in Part (4) and (5) and explain the reason(s)that the two intervals are different.
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