Working backwards, Part I

A \({{ params.description.confidence_level }}\)% confidence interval for a population mean, \(\mu\), is given as (\({{ params.description.lower }}\), \({{ params.description.upper }}\)). This confidence interval is based on a simple random sample of \({{ params.description.sample_size }}\) observations. Assume that all conditions necessary for inference are satisfied. Use the \(t\)-distribution in any calculations.

Part 1

Calculate the sample mean.

Answer Section

Please enter a numeric value in.

Part 2

Calculate the sample standard deviation.

Answer Section

Please enter a numeric value in.

Attribution

Problem is from the OpenIntro Statistics textbook, licensed under the CC-BY 4.0 license.