Math 10 Winter 2011 FORM W
Name
Last:______________
First: ___________________
Exam 2:
Chapters 4,5,6,7
Class Time:________________________
DIRECTIONS:
•
Print your NAME and CLASS TIME on THIS EXAM.
•
Print your NAME and CLASS TIME on your SCANTRON.
•
Write FORM A on your SCANTRON.
•
Each question has exactly one BEST answer.
There are 21 questions.
•
You may write on this exam.
There is no scratch paper allowed.
•
Each question is worth 5 points for a total of 105 points. This includes 5 bonus points!
•
If you have no note page, you must write NO NOTES
on your SCANTRON.
•
Put your SCANTRON and PAGE of NOTES inside your EXAM.
Before you start packing up your
things, turn in your EXAM and SCANTRON. Then go back to your desk to pack up your
materials.
When your exam is returned, you will get back all materials you turned in.
•
Turn your cell phone OFF.
Any noise from a cell phone will signal that your exam is over.
•
FAILURE TO FOLLOW ALL INSTRUCTIONS WILL COST YOU THE 5 BONUS POINTS!
1.
The graph below shows three normal probability distributions.
Which distribution has the largest value of µ ?
Which distribution has the largest
value of
σ
?
A.
Largest µ : Graph I
;
Largest
σ
: Graph II
B.
Largest µ : Graph III
;
Largest
σ
: Graph II
C.
Largest µ : Graph II
;
Largest
σ
: Graph III
D.
Largest µ : Graph III
;
Largest
σ
: Graph I
2.
The following represents the probability distribution for the number of Advanced Placement (AP)
exams taken by students at City High School.
Let X = the number of AP exams taken by one student enrolled at City High School.
X
P(X)
0
0
.
68
1
0
.
09
2
0
.
12
3
4
0
.
05
Find the expected value for the average number of AP exams taken by students enrolled at this high school.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
3.
At a certain location the carbon monoxide levels (in mg/m
3
) in the atmosphere follow an unknown
distribution with an average of 7
.
4 and a standard deviation of 2.4.
Find the probability that for a random
sample of 30 test measurements, the sample average carbon monoxide level is less than 7
.
2.
4. According to data from the USGS, on average 18 large earthquakes occur each year worldwide.
(United States Geological Survey (USGS):
Earthquakes magnitude 7 or higher:
http://earthquake.usgs.gov/learn/topics/increase_in_earthquakes.php)
Find the probability that
at most 15
large earthquakes occur during a one year period.
Questions 5  7 refer to the following:
Suppose that the amount of time that it takes a worker to complete an online training module is uniformly
distributed between 40 and 56 minutes.
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '11
 Plum
 Math, Statistics, Normal Distribution, Probability, d., B., Scantron

Click to edit the document details