1. Frank just completed two tests. On his biology test, he earned a 55 while he earned a 70 on his chemistry test. The class average on the biology test was a 60 with a standard deviation of 10 while the class average on the chemistry test was an 80 with a standard deviation of 15. Relative to each class, which test did he do better on?
2. Assume that the distribution of salaries for nurses is normally distributed (in reality they aren't, but that's okay) with a mean of $50,000 with a standard deviation of $15,000.
A. 68% of nurses will earn a salary in what range?
b. 95% of nurses will earn a salary in what range?
c. 99.7% of nurses will earn a salary in what range?