Question

Does the histogram appear to approximate a normal distribution? why or why not?

Answer 1

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.

Explanation:

Answer 2

The histogram is missing, but we can define a normal distribution. In statistic, distributions are the description about how values are distributed, when we talk about a normal distribution, we refer to a symmetrical data distribution, which graph is like a bell (refer to image attached).

If we have a histogram, we can also tell if it represents a normal distribution, because the bars forms also a bell. (refer to the image).

This bell figured helps to determined probabilities about a specific event, using the standard deviation.