Mathematics, 01.04.2020 20:15 nsuleban8663
A commuter must pass through five traffic lights on her way to work, and she will have to stop at each one that is red. After years of commuting she has developed the following probability distribution for the number of red lights she stops at each day on her way to work:
0 1 2 3 4 5
.05 .25 .35 .15 .15 .05
Note that the standard deviation of the above probability distribution is = 1.26
How many red lights should she expect to stop at each day on her way to work?
a.3
b. 2.5
c. 2
d. 2.25
e. 0.35
Suppose each red light delays the commuter 1.5 minutes. What is the standard deviation of the number of minutes that she is delayed by red lights?
a. 2.38
b. 1.89
c. 1.59
d. 3.57
e. 2.25
Answers: 3
Mathematics, 21.06.2019 15:30, nayelimoormann
Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?
Answers: 1
A commuter must pass through five traffic lights on her way to work, and she will have to stop at ea...
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