Age at first marriage, part ii. exercise 4.16 presents the results of a 2006 - 2010 survey showing that the average age of women at first marriage is 23.44. suppose a social scientist believes that this value has increased in 2012, but she would also be interested if she found a decrease. below is how she set up her hypotheses. indicate any errors you see. h0 : ¯x = 23.44 years old ha : ¯x > 23.44 years old 4.21