I'm not even sure exactly what is being asked here:

A doctor believes that the average age of single mothers is 20 years.A random sample of 10 single mothers was drawn from a Obstetrics Clinic. Their ages are 22, 17, 27, 20, 23, 19, 24, 18, 19, and 24 years.

Test to determine if we can infer at the 5% significance level that the population mean is not equal to 20.State your conclusion.

You may use etherthe table below from Excel or the formulas in your book.

t-Test: MeanMean21.3Standard Deviation3.199Observations10Hyothesized Mean20t Statistic1.2851P(T<=t) One-Tail0.1154t Critical One-Tail1.8331P(T<=t) Two-Tail0.2308t Critical Two-Tail2.2622