The following data were drawn from a normal population: 15, 4, 24, 8, 16, 13, 9, 15, 7, and 22. Estimate the population mean with 90% confidence.
LCL: ______________
UCL: ______________

Normal Population

A population distribution that follows a normal or Gaussian curve, with a symmetric shape centered around the mean, typical in many natural phenomena.

Confidence

In statistical inference, the degree of certainty or probability that a parameter lies within a specified range.

Population Mean

The average value of a set of characteristics in the entire population, calculated by summing all values and dividing by the number of observations in the population.