Question 19. Suppose that scores on a national achievement exam have a mean of 100 and standard deviation of 20. If these scores are normally distributed, thena) Approximately 68% will fall between ————————–and ——————Show your workb) Approximately 95% of the scores will fall between ————– and —————–Show your workc) Approximately 95% of the scores will fall between ————- and —————Show your work
