Alondra takes a sample of 22 different-gender married couples. In her sample, she found that the husband was 120.4 millimeters taller on average, and differences in the husband's and wife's heights had a standard deviation of 80.95 millimeters. Calculate a 95% confidence interval for the mean difference between husband height and wife height. Please write your answers to at least four places. a. Critical value: t b. Standard error: c. Margin of error: d. Confidence interval: