According to Beautiful Bride magazine the average age of a g

According to Beautiful Bride magazine, the average age of a groom is now 26.2 years. A sample of 16 prospective grooms in Chicago revealed that their average age was 26.6 years with a standard deviation of 5.3 years. What is the test value for a t test of the claim? Assume the population ages are normally distributed. Round to 2 decimal places.

Solution

              
              
Getting the test statistic, as              
              
X = sample mean =    26.6          
uo = hypothesized mean =    26.2          
n = sample size =    16          
s = standard deviation =    5.3          
              
Thus, z = (X - uo) * sqrt(n) / s =    0.301886792 = 0.30 [ANSWER]