Question

Finding x and E: A 98% confidence interval for a population mean is given as 27.2 < μ < 33.2. Round your answers to 1 decimal place.

(a) Calculate the sample mean.

x =   

(b) Calculate the margin of error.

E =

Answer 1

Here in this scenario it is given that A 98% confidence interval for a population mean is given as 27.2 < μ < 33.2.

Now the sample mean and margin of error is calculated using simple steps as below,

The sample mean is 30.2

b) The margin of error E is 3.0.

Thank you.