A researcher believes that in recent years women have been
getting taller. Ten years ago, the average height of young adult
women living in his city was 63 inches. The standard deviation is
not known. He randomly samples eight young adult women currently
residing in the city and measures their heights.
The sample data obtained is: [64, 66, 68, 60, 62, 65, 66, 63].
Use a significance level of alpha=0.05 to test if women are now
taller.