A sample of size n=70 is drawn from a normal population whose standard deviation is σ=5.1 . The sample mean is x=35.46 (a) Construct a 98% confidence interval for μ. Round the answer to at least two decimal places. (b) If the population were not approximately normal, would the confidence interval constructed in part (a) be valid?Explain.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.