MATH 221 (MATH221)
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Math 221 Week 2 Homework Answer key Updated Spring 2023.
- Exam (elaborations) • 11 pages • 2023
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Question 1 
2 / 2 pts 
A student believes that there is a 90% probability of getting an A on the next test. This would be 
considered: 
Empirical probability 
Manufactured probability 
Subjective probability 
Classical probability 
Question 2 
2 / 2 pts 
Given the following information, find the probability that a randomly selected student will be 
tall, but not
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MATH 221 WEEK 1-7HomeworkAssignments|Quizes Collection (100% CORRECT ANSWERS) | Highly Rated Paper | GRADED A. 2023
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MATH 221 WEEK 1-7HomeworkAssignments|Quizes Collection (100% CORRECT ANSWERS) | Highly Rated Paper | GRADED A. 2023
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DeVry University, Naperville Math 221 Week 2 Homework...Quiz (answered correctly)
- Exam (elaborations) • 11 pages • 2023
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Question 1 
2 / 2 pts 
The probability of drawing one card and getting queen is 4/52. This would be considered: 
Subjective probability 
Empirical probability 
Manufactured probability 
Classical probability 
IncorrectQuestion 2 
0 / 2 pts 
Given the following information, find the probability that a randomly selected student will be 
very tall. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21 
21.0% 
10.1% 
21.6% 
49.5% 
Question 3 
2 / 2 pts 
Given the following in...
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Math 221 Week 2 Homework Quiz (answered correctly)Spring 2023.
- Exam (elaborations) • 11 pages • 2023
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Question 1 
2 / 2 pts 
A student believes that there is a 90% probability of getting an A on the next test. This 
would be considered: 
Manufactured probability 
Classical probability 
Subjective probability 
Empirical probability 
Question 2 
2 / 2 pts 
Given the following information, find the probability that a randomly selected student will 
be very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21 
21.0% 
39.4% 
21.6% 
28.8% 
IncorrectQuestion 3 
0 / 2 pts...
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ATH221_W2_Lab_Excel_Adrian Arneson/MATH221 Statistics for Decision Making Week 2 Lab
- Exam (elaborations) • 7 pages • 2023
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Week 2 Lab Instructions-BEGIN 
 Data have already been formatted and entered into an Excel worksheet. 
 Obtain the Lab data file (Excel) for this lab from your instructor. 
 Use the Week 1 spreadsheet (available from Week 1: Resources) for graphs and 
calculations. You will need to copy data from the Lab data file into the Week 1 
calculations spreadsheet to answer some of these Lab questions. 
 The names of each variable from the survey are in the first row of the Lab data 
Workshee...
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DeVry University, Naperville MATH 221 Week 3 Quiz (answered correctly)
- Exam (elaborations) • 18 pages • 2023
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Question 1 
0 / 2 pts 
(CO 1) A survey of 385 people who like wild sweaters found that 74% had a wild holiday 
sweater. What is the population and what is the sample? 
Population: people who like wild sweaters: Sample: the 385 people who had a wild 
holiday sweater 
Population: people who like sweaters; Sample: the 74% that had a wild holiday sweater 
Population: people who like wild sweaters; Sample: the 385 people who like wild 
sweaters 
Population: people who like wild sweaters; Sample: the ...
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MATH 221 Week 5 Homework well explained 2023 latest
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Question 1 
2 / 2 pts 
From a random sample of 58 businesses, it is found that the mean time 
the owner spends on administrative issues each week is 20.53 with a 
standard deviation of 3.54. What is the 95% confidence interval for 
the amount of time spent on administrative issues? 
 (19.24, 24.14) 
 (16.99, 24.07) 
 (13.45, 27.61) 
X (19.62, 21.44) 
Question 2 
2 / 2 pts 
If a confidence interval is given from 43.85 up to 61.95 and the mean 
is known to be 52.90, what is the maximum error? 
 X9...
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MATH 221 FINAL EXAM REVIEW(Version 2) QUESTIONS WITH ANSWERS: DEVRY UNIVERSITY
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Jack weighs 160 pounds and his sister weighs 110 pounds. If the mean weight for 
men his age is 175 with a standard deviation of 14 pounds and the mean weight for 
women is 145 with a standard deviation of 10 pounds, determine whose weight is closer 
to "average." Write your answer in terms of zscores and areas under the normal curve. 
for Jack z = 1.07 
14 
15 
14 
160 175 
≈ − 
− 
= 
− 
= 
− 
σ 
x µ 
, when z = 1.07, area = .1423 
for his sister 2.50 
10 
25 
10 
110 14...
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MATH 221 - WEEK 6 QUIZ.
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MATH 221 - WEEK 6 QUIZ. / MATH 221 - WEEK 6 QUIZ. 
Question 1 
0 / 2 pts 
(CO 5) A company claims that its heaters last less than 5 years. Write the null and 
alternative hypotheses and note which is the claim. 
You Answered 
Ho: μ ≤ 5, Ha: μ > 5 (claim) 
Correct Answer 
Ho: μ ≥ 5, Ha: μ < 5 (claim) 
Ho: μ > 5 (claim), Ha: μ ≤ 5 
Ho: μ = 5 (claim), Ha: μ ≥ 5 
See text page 349
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MATH 221 Quiz Week 7 : DeVry University, New York - Worth 60 Points.
- Exam (elaborations) • 19 pages • 2022
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WEEK 7: QUIZ 
Points 60 Questions 30 
Time Limit 120Minutes 
Instructions 
Here is some information about your quiz or exam. 
This quiz covers Weeks 5 and 6, Chapters 6 and 7, and Course Objectives (COs) 6 
and 7. 
This quiz has 30 multiple choice questions worth 2 points each for a total value of 60 
points. 
You have 120 minutes to finish this quiz. 
When the time limit is reached you will be exited from the exam. 
Attempt History 
Attempt Time Score 
LATEST Attempt 1 84 minutes 30 out of 60 
...
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