Question: Because couples are choosing to have fewer children family size is decreasing in Poduck. At one time the mean number of children under age 3 in a family was 2.6. Recently the Poduck Census Group did a survey of 36 families and found the mean number of children under age 3 to be 1.95 with a sample standard deviation of 0.70. Using a = 0.05, can we conclude that the mean number of children under age 3 is not 2.6 anymore.