7. Nymphadora Tonks scored an 87 on her Defense Against the Dark Arts N.E.W.T. (Nastily

Exhausting Wizarding Test) and a 94 on her Transfiguration N.E.W.T. The average score for

the first test was a 79.5 with a standard deviation of 13.7. The average score for the second test

was a 78.4 with a standard deviation of 9.3. Which test did she do relatively better on? Explain!