Heights of 9-Year-Olds At age 9 the average weight (21.3 kg) and the average height (124.5cm) for both boys and girls are exactly the same. A random sample of -year-olds yielded these results. At a=0.05, do the data support the given claim that there is a difference in heights?

Answer rating: 100% (QA)

Solution Calculating the ... View the full answer