Unit 1, Lesson 13
More Standard Deviation
Algebra 1
Practice
Problem 1
Three drivers compete in the same fifteen races. The mean and standard deviation for the race times of each of the drivers are given.
Driver A has a mean race time of 4.01 seconds and a standard deviation of 0.05 seconds.
Driver B has a mean race time of 3.96 seconds and a standard deviation of 0.12 seconds.
Driver C has a mean race time of 3.99 seconds and a standard deviation of 0.19 seconds.
- Which driver has the fastest typical race time?
- Which driver’s race times are the most variable?
- Which driver do you predict will win the next race? Support your prediction using the mean and standard deviation.
Problem 2
The widths, in millimeters, of fabric produced at a ribbon factory are collected. The mean is approximately 23 millimeters, and the standard deviation is approximately 0.6 millimeters.
Interpret the mean and standard deviation in the context of the problem.
Problem 3
Select all the statements that are true about standard deviation.