Most engaged couples expect or at least hope they will have high levels of marital longevity. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital longevity. (Data source: These data were obtained from the National Center for Health Statistics.) Suppose a social psychologist sets out to study the role of having children in marital longevity. He measures marital longevity in a random sample of couples with children and in a random sample of childless couples and compares the data. Assume that marital longevity is normally distributed and that the variance in longevity is approximately the same among couples with children as among childless couples. Step 1: Do the data meet the test requirements? A. Is there independent random sampling? Yes No B. What is the level of measurement of the variables? Ordinal Nominal Interval-ratio C. Is the sampling distribution normally distributed? No Yes