14-12. Given the following absolute frequency distribution, determine if the data set could have been drawn from a normal distribution with μ = 75 and

σ = 15. Use α = 0.05.
Classes ofX Oi 0–19 3 20–39 10 40–59 22 60–79 74 80–99 68 100–119 35 120–139 14 140–159 2