L07 Quiz_ Homework_ Social Science Statistics
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Date
Apr 3, 2024
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L07 Quiz: Homework
Due Feb 3 at 10:59pm
Points 10
Questions 10
Available Jan 24 at 11pm - Feb 3 at 10:59pm
Time Limit None
Allowed Attempts 2
Instructions
This quiz was locked Feb 3 at 10:59pm.
Attempt History
Attempt
Time
Score
KEPT
Attempt 2
5 minutes
10 out of 10
LATEST
Attempt 2
5 minutes
10 out of 10
Attempt 1
31 minutes
8 out of 10
Score for this attempt: 10 out of 10
Submitted Feb 1 at 9:29pm
This attempt took 5 minutes.
Preparation
Download the L07 Homework Assignment
(https://byuistats.github.io/BYUI_M221_Book/hp/L07/07_HW_Assignment_A.html) and answer the
questions.
Attempt each problem on your own.
You are encouraged to collaborate with other students after your first attempt.
Download the L07 Homework Answer Key
(https://byuistats.github.io/BYUI_M221_Book/hp/L07/07_HW_Answer_Key_A.html) and check your
answers.
Take the Quiz
You may use your notes, but you should complete the quiz without help from others.
This quiz is a tool to help you and your instructor gauge your progress.
On this quiz, you may use your notes, but you should complete the quiz without help from
others. This quiz is a tool to help you and your instructor gauge your progress.
Question 1
1 / 1 pts
Correct!
0.778
0.778 (with margin: 0.001)
Question 2
1 / 1 pts
Correct!
0.218
0.218 (with margin: 0.001)
Question 3
1 / 1 pts
Correct!
0.041
0.041 (with margin: 0.001)
If needed, here's a link to the Normal Probability Applet
(https://byuimath.com/apps/normprob.html) .
Special Note: For this lesson and all subsequent lessons, unless otherwise specified, round your
answers to 3 decimal places.
Use the following information to answer the next 4 questions.
The Law School Admission Test (LSAT) is required for admission to many law schools. The scores on
the LSAT are approximately normal with mean of 150 and standard deviation of 9. Queen's School of
Business in Kingston, Ontario requires a minimum LSAT score of 157 for admission.
What is the z-score corresponding to an LSAT score of 157? Round your answer to three decimal
places. (Example: 0.398)
What is the probability that a randomly selected person who took the LSAT would score above 157?
Round your answer to three decimal places. (Example: 0.398)
What is the probability that the mean score for 5 randomly selected people who took the LSAT would be
above 157? Round your answer to three decimal places. (Example: 0.398)
Question 4
1 / 1 pts
Correct!
0.0069
0.007 (with margin: 0.001)
Question 5
1 / 1 pts
Mean = 3.7, standard deviation = 0.9
Mean = 0.463, standard deviation = 0.9
Correct!
Mean = 3.7, standard deviation = 0.113
Mean = 0.463, standard deviation = 0.113
Question 6
1 / 1 pts
Correct!
0.0377
0.038 (with margin: 0.001)
What is the probability that the mean score for 10 randomly selected people who took the LSAT would
be above 157? Round your answer to three decimal places. (Example: 0.398)
Use the following information to answer the next 2 questions.
Suppose the mean GPA of BYU-Idaho students is 3.7 and the standard deviation is 0.9. It is well known
that this distribution is left-skewed.
If you take a random sample of 64 BYU-Idaho students, what is the mean and standard deviation of the
distribution of sample means of these GPA scores?
What is the probability that the mean GPA for 64 randomly selected BYU-Idaho students will be less than
3.5? Round your answer to three decimal places.
Use the following information to answer the next 4 questions.
Tanker trucks are designed to carry huge quantities of gasoline from refineries to filling stations. A factory
that manufactures the tank of the trucks claims to manufacture tanks with a capacity of 8550 gallons of
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Question 7
1 / 1 pts
Correct!
0.5
0.5 (with margin: 0.05)
Question 8
1 / 1 pts
Correct!
0.692
0.692 (with margin: 0.001)
Question 9
1 / 1 pts
Correct!
2.235
2.236 (with margin: 0.001)
Question 10
1 / 1 pts
Correct!
0.991
0.991 (with margin: 0.001)
gasoline. The actual capacity of the tanks is normally distributed with mean gallons and
standard deviation gallons.
Find the z-score corresponding to a tank with a capacity of 8550 gallons. Round your answer to
one decimal place. (Example: 0.3)
What is the probability that a randomly selected tank will have a capacity of less than 8550 gallons?
Round your answer to three decimal places. (Example: 0.398)
A simple random sample of n = 20 tanks will be selected. Find the z-score corresponding to a sample
mean capacity for 20 tanks of 8550. Round your answer to three decimal places. (Example: 0.398)
A simple random sample of n = 50 tanks will be selected. What is the probability that the mean capacity
for these 50 tanks will be greater than 8540 gallons? Round your answer to three decimal places.
(Example: 0.398)
Quiz Score: 10 out of 10
COPYRIGHT 2024 BRIGHAM YOUNG UNIVERSITY-IDAHO
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Adapted from Kloppenborg TJ, Anantatmula V and Wells KN (2019) Contemporary Project Management
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Explain what is meant by the notion that "some conflicts on projects are useful..."
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* 00
# 3
Question 31
Which of the following statements regarding Gantt charts is TRUE?
O Gantt charts are visual devices that show the duration of activities in a project.
O Gantt charts use the four standard spines of Methods, Materials, Manpower, and Machinery.
All of the answer choices are correct.
O Gantt charts are expensive.
O Gantt charts give a timeline and precedence relationships for each activity of a project.
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Please answer all parts.
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4.What is the probability that it would be in more than 14 days? Show ALL of your work.
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••• 3.32 Kimpel Products makes pizza ovens for commercial
use. James Kimpel, CEO, is contemplating producing smaller
X ovens for use in high school and college kitchens. The activities
necessary to build an experimental model and related data are
given in the following table:
NORMAL CRASH
TIME
NORMAL CRASH
ACTIVITY (WEEKS) (WEEKS) COST ($) COST ($) PREDECESSOR(S)
TIME
IMMEDIATE
A
3
1,000
1,600
В
2
1
2,000
2,700
C
1
1
300
300
D
7
3
1,300
1,600
A
E
3
850
1,000
F
1
4,000
5,000
C
4
2
1,500
2,000
D, E
a) What is the project completion date?
b) Crash this project to 10 weeks at the least cost.
c) Crash this project to 7 weeks (which is the maximum it can be
crashed) at the least cost. PX
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21
30
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55
6
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32
8
19
16
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31
19
31
26
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32
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29
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36
24
44
24
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38
22
20
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14
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10
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Question 6
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Question Help
Kimpel Products makes pizza ovens for commercial use. James Kimpel, CEO, is contemplating producing smaller ovens for use in high school and college kitchens.
The activities necessary to build an experimental model and related data are listed in the following table:
Total Cost
Normal Time
Crash Time Normal
with
Immediate
Activity
(weeks)
(weeks)
Cost
Crashing Predecessor(s)
$1,400
$2,000
$2,100
$2,800
A
3
2.
1
C
1
$300
$300
A
$1,400
$900
$1,680
$1,050
$5,750
D
7
E
$4,250
$1,800
F
1
G
4
$2,300
D, E
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