Suppose the total cholesterol levels of all women 20 or older in U.S. have the average of μ=170μ=170 mg/dL and the standard deviation σ=34σ=34 mg/dL. Randomly choose a SRS of 100 women 20 years or older and let x¯x¯ be the average cholesterol level of these 100 women.     a.   What is the standard error (SE)?    b.   What is the sample distribution of x¯x¯?    c.   What is the probability that x¯x¯ takes value between 168 and 172 mg/dL?

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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.