100 points !!!!!
a) No, the voltages do not appear to follow a normal distribution; instead of being concentrated near the middle of the distribution, the values appear to be rather evenly distributed.
b) Yes, the voltages appear to follow a normal distribution; the values appear to be rather evenly distributed.
c) No, the voltages do not appear to follow a normal distribution; instead of being concentrated near the ends of the distribution, the values appear to be rather evenly distributed.
D) Yes, the voltages appear to follow a normal distribution; the values are not concentrated near the ends of the distribution.