Question

Part 13 Part 2 of 3 (b) A simple random sample of size 48 has mean x = 3.04. The population standard deviation is o=1.83. Construct a 90% confidence interval for the population mean, The parameter is the population (Choose one) The correct method to find the confidence interval is the (Choose one) method. Ichi-square

Answer 1

The parameter is population mean.

The correct method to find the confidence interval is z method.

$\bar{x}\pm Z*\frac{\sigma }{\sqrt{n}} = 3.04\pm 1.645*\frac{1.83 }{\sqrt{48}} =(2.61,3.48)$