Question The amount of credit card debt that an individual carries follows a normal distribution with a population standard deviation
of 0.7 thousand dollars and an unknown population mean. If a random sample of 45 people is taken and results in a sample
mean of 4.2 thousand dollars, find a 90% confidence interval for the population mean.
Use the tool below to calculate your confidence interval. Choose the correct confidence level, sample mean, population
standard deviation, and sample size. Then view the confidence interval indicated on the x-axis to find your answer. Please
note, you'll need to use the sliders above the graph to change the x-axis markers. Round your answers to 2 decimal places.