A random sample of 10 single mothers was drawn from a Obstetrics Clinic. Their ages are as follows: 22172720231924181924 We want to determine at the 5% significance level that the population mean is not equal to 20. What is the rejection region?

0.09

Step-by-step explanation:

Let x = ages of mother

x  :  22   17    27    20    23     19      24    18    19    24

N = 10

Mean = ∑x/N = 218/10 = 21.8

Difference in mean = 21.8 - 20 = 1.8

If significance level = 5% or 0.05

∴ Rejection region = 1.8 X 0.05 = 0.09