# Finding a confidence interval

We wish to estimate the mean serum indirect bilirubin level of 4 day old infants. The mean for a sample of 160 infants was found to be 5.98 mg/100cc. Assume that the bilirubin levels of 4-day-old infants are approximately normally distributed with a standard deviation of 3.5mg/100cc. Construct a 95% confidence interval for the true mean bilirubin level in 4-day-old infants.

© BrainMass Inc. brainmass.com June 4, 2020, 4:28 am ad1c9bdddfhttps://brainmass.com/statistics/sampling-distribution/finding-a-confidence-interval-562796

#### Solution Preview

We wish to estimate the mean serum indirect bilirubin level of 4 day old infants. The mean for a sample of 160 infants was found to be 5.98 mg/100cc. Assume that the ...

#### Solution Summary

In this solution, we provide with a detailed solution to finding a confidence interval for the population mean.

$2.19