STATISTICS Math 221
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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, Keller Graduate School of Management_MATH 221Week 2 quiz (Latest 2022/2023)
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Question 1 2 / 2 pts (CO 2) A random number generator is used to select a number from 1 to 100. What is the probability of selecting an odd number? 0.077 0.050Correct! 0.500 0.250 Question 2 2 / 2 pts (CO 2) What is the sample space of rolling two four-sided die? 1, 2, 3, 4Correct! (1,2)(1,3)(1,4)(2,2)(2,3)(2,4)(3,4)(4,4) (1, 1, 2, 2, 3, 3, 4, 4) (1,1)(2,2)(3,3)(4,4) Question 3 0 / 2 pts (CO 2) Consider the table below Response (number of cats owned) Frequency None 659 One 329 Two 52 Three 13 Fo...
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Math 221 Week 1 Quiz Answers 2023
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Question 1 
2 / 2 pts 
A recent survey of the alumni of a university indicated that the average salary of 10,000 
of its 200,000 graduates was $130,000. The $130,000 would be considered a: 
Population 
Parameter 
Sample 
Statistic 
IncorrectQuestion 2 
0 / 2 pts 
A recent survey of the alumni of a university indicated that the average salary of 10,000 
of its 200,000 graduates was $130,000. The 10,000 would be considered a: 
Population 
Parameter 
Sample 
Statistic 
Question 3 
2 / 2 pts 
Based ...
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Math 221 Week 2 Homework Quiz (answered correctly)
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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 very tall. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21 
50.5% 
39.4% 
10.1% 
49.5% 
IncorrectQuestion...
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DeVry University, Naperville MATH 221 Week 3 HW help questions and answers well elaborated
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Let x represent the number of pets in pet stores. This would be considered what type of 
variable: 
Discrete 
Nonsensical 
Lagging 
Continuous 
Flag this Question 
Question 22 pts 
Let x represent sheets of paper in a package. This would be considered what type of 
variable: 
Discrete 
Continuous 
Inferential 
Distributed 
Flag this Question 
Question 32 pts 
Consider the following table. 
Age Group Frequency 
18-29 9831 
30-39 7845 
40-49 6869 
50-59 6323 
60-69 5410 
70 and over 5279 
If you c...
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DeVry University, Naperville MATH 221 Week 3 HW Quiz (answered correctly)
- Exam (elaborations) • 12 pages • 2023
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Question 1 
2 / 2 pts 
Let x represent the height of first graders in a class. This would be considered what type 
of variable: 
Discrete 
Continuous 
Nonsensical 
Lagging 
Question 2 
2 / 2 pts 
Let x represent the height of corn in Oklahoma. This would be considered what type of 
variable: 
Continuous 
Discrete 
Inferential 
Distributed 
IncorrectQuestion 3 
0 / 2 pts 
Consider the following table. 
Age Group Frequency 
18-29 9831 
30-39 7845 
40-49 6869 
50-59 6323 
60-69 5410 
70 and over 52...
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DeVry University, Naperville MATH 221 quiz (Latest 2023)
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Question 1 
2 / 2 pts 
(CO 4) Consider the following table: 
Age Group Frequency 
18-29 983 
30-39 784 
40-49 686 
50-59 632 
60-69 541 
70 and over 527 
If you created the probability distribution for these data, what would be the probability of 
30-39? 
0.189 
0.237 
0.425 
0.165 
Question 2 
2 / 2 pts 
(CO 4) Consider the following table of hours worked by part-time employees. These 
employees must work in 5 hour blocks. 
Weekly hours worked Probability 
5 0.06 
15 0.61 
20 0.18 
25 0.15 
Fin...
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MATH221_W4_Lab_Excel_Adrian Arneson>MATH221 Statistics for Decision Making Week 4 Lab study guide Updated Spring 2023.
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Calculating Binomial Probabilities 
NOTE: For question 1, you will be using the same data file your instructor gave you 
for the Week 2 Lab. 
1. Using the data file from your instructor (same one you used for the Week 2 Lab), 
calculate descriptive statistics for the variable (Coin) where each of the thirty-five 
students in the sample flipped a coin 10 times. Round your answers to three decimal 
places and type the mean and the standard deviation in the grey area below. 
Mean: 3.886 
Standard d...
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MATH221 Statistics for Decision Making Week 6 Lab quiz (Latest 2022/2023)
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Short Answer Writing Assignment 
All answers should be complete sentences. 
We need to find the confidence interval for the SLEEP variable. To do this, we need to 
find the mean and standard deviation with the Week 1 spreadsheet. Then we can the 
Week 5 spreadsheet to find the confidence interval. 
First, find the mean and standard deviation by copying the SLEEP variable and pasting it 
into the Week 1 spreadsheet. Write down the mean and the sample standard deviation as 
well as the count. Open...
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DeVry University, Keller Graduate School of Management_MATH 221Week 7 quiz (Latest 2022/2023)
- Exam (elaborations) • 18 pages • 2023
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Question 1 
2 / 2 pts 
(CO6) From a random sample of 55 businesses, it is found that the mean time that 
employees spend on personal issues each week is 5.8 hours with a standard deviation 
of 0.35 hours. What is the 95% confidence interval for the amount of time spent on 
personal issues? 
(5.74, 5.90) 
(5.73, 5.87) 
(5.72, 5.88) 
Correct! 
(5.71, 5.89) 
Question 2 
0 / 2 pts 
(CO6) If a confidence interval is given from 8.54 to 10.21 and the mean is known to be 
9.375, what is the maximum erro...
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