1. a) Construct a 94% confidence interval for the population mean, u. Assume the population has a normal distribution. A sample of 40 part- time workers had mean annual earnings of $3120 with a...

Help required


Extracted text: 1. a) Construct a 94% confidence interval for the population mean, u. Assume the population has a normal distribution. A sample of 40 part- time workers had mean annual earnings of $3120 with a standard deviation of $677. Round to the nearest dollar. (Round to 2 decimals) B) Construct a 93% confidence interval for the population mean, u. Assume the population has a normal distribution. A group of 36 randomly selected employees has a mean age of 25.4 years with a standard deviation of 3.8 years. Round to the nearest tenth. (Round to 3 decimals)