Because couples are deciding to have fewer children, the family size of the United States has declined continuously during the past few decades. According to the U. S. Bureau of the Census, the mean family size was 3.19 with a standard deviation of 0.70 in 1995. A researcher wanted to check if the current mean family size is less than 3.19. A sample of 900 families taken this year by this researcher produced a mean family size of 3.16. Using the .025 significance level, can we conclude that the mean family size has declined since 1995