http://www.ck12.org Chapter 4. Standard Distributions - Basic
- Is the following graph representing a normal distribution, and exponential distribution, or a binomial distribu-
tion? How can you tell? - Describe in your own words the difference between the binomial distribution and the normal distribution.
- Find two examples of data that can be collected resulting in an exponential distribution.
Review Answers
- This is binomial since the data shows discrete frequencies and is not in the shape of a normal curve.
- This is exponential since the data shows continuous frequencies is in the shape of an exponential curve. It
could represent a decay curve. - This curve is clearly a normal distribution because it is a normal curve with an equal spread of the data on
either side of the center point. - Although this histogram is getting close to the graph of a normal distribution, it is still not equal area on either
side of the mean (center point). - This is exponential since the data shows continuous frequencies is in the shape of an exponential curve. It
could represent a growth curve. - Although this histogram is getting closer to the graph of a normal distribution, it is still not equal area on either
side of the mean (center point). One could probably argue that it is both but would have to wait until a later
chapter to actually learn to calculate the values of mean and standard deviation in order to prove.