1. The scores on a college entrance exam have an approximate normal distribution with mean,= 52 points and a standard deviation,= 11 points.
2. 1.About 68% of the y values lie between what two values? These values are,.
3. 2.About 95% of the y values lie between what two values? These values are,.
4. 3.About 99.7% of the y values lie between what two values? These values are,.