Which statement is true about a dot plot?

a. a dot plot shows the median of a data set.
b. a dot plot shows the first quartile, but not the second quartile of any given data set
c. a dot plot shows the frequency of the individual values of any given data set.
d. a dot plot shows the frequency of an interval of values of any given data set.
e. a dot plot gives information about the average of any given data set.

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?