Math221 week 5 - Study guides, Class notes & Summaries
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MATH 221 Week 5 Quiz
- Exam (elaborations) • 22 pages • 2021
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1.	Question:(CO 3) Consider the following table. If you created the probability distribution for these data, what would be the probability of 60-69? 
2.	Question:(CO 3) Consider the following table of hours worked by part-time employees. These employees must work in 5-hour blocks.Find the mean of this variable. 
3.	Question:(CO 3) Consider the following table. Find the variance of this variable. 
4.	Question:(CO 3) Consider the following table. Find the standard deviation of this variable. 
5.	Q...
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MATH 221 Week 5 Homework; Statistics for Decision-Making
- Other • 17 pages • 2021
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1.	Question:From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a population standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? 
2.	Question:If a confidence interval is given from 43.85 to 61.95 and the mean is known to be 52.90, what is the margin of error? 
3.	Question:If a shirt manufacturer wanted to make shirts that fit most individuals, wha...
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MATH 221 Week 5 Homework
- Other • 16 pages • 2021
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1.	Question: From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a population standard deviation of 3.23. What is the 95% confidence interval for the amount of time spent on administrative issues? 
2.	Question: If a confidence interval is given from 43.83 up to 61.97 and the mean is known to be 52.90, what is the margin of error? 
3.	Question: If a computer manufacturer needed a supplier that could produce parts ...
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MATH 221 Week 5 Homework; Statistics for Decision-Making
- Other • 16 pages • 2021
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1.	Question: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 population standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? 
2.	Question:If a confidence interval is given from 43.83 up to 61.97 and the mean is known to be 52.90, what is the margin of error? 
3.	Question:If a grocery store purchases paper bags from a company, they want them ge...
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MATH 221 Week 5 Homework; Statistics for Decision-Making
- Other • 16 pages • 2021
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- $20.49
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1.	Question: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 population standard deviation of 3.23. What is the 95% confidence interval for the amount of time spent on administrative issues? 
2.	Question:If a confidence interval is given from 43.83 up to 61.97 and the mean is known to be 52.90, what is the margin of error? 
3.	Question:If a car manufacturer wanted lug nuts that fit nearly all the time, what ...
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MATH 221 Week 5 Quiz
- Exam (elaborations) • 13 pages • 2021
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1.	Question: Let x represent the number of cars in a parking lot. This would be considered what type of variable: 
2.	Question: Let x represent the height of corn in Oklahoma. This would be considered what type of variable: 
3.	Question: If you created the probability distribution for these data, what would be the probability of 40-49? 
4.	Question: Consider the following table.Find the mean of this variable. 
5.	Question: Consider the following table. Find the variance of this variable. 
6.	Que...
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MATH 221 Week 5 Discussion Post #3
- Other • 2 pages • 2021
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Joseph and Kandy when we develop a confidence interval (CI) we are computing a rangeofvalues that’s likely to include a population value with a certain degree of confidence. It isan interval that tells us that the population means lies between an upper and lowerinterval.What are commonly used confidence intervals? (Responses to the questionabove)
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MATH 221 Quiz Week 7 : DeVry University, New York - Worth 60 Points.
- Exam (elaborations) • 19 pages • 2019
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MATH221 Quiz Week 7
A Formulas Included
Questions 1
(CO 4) From a random sample of 55 businesses, it is found that the mean time that employees spend on persona 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?
(5.72, 5.88)
(5.73, 5.87)
(5.74, 5.90)
(5.71, 5.89)
Question 2
(CO 4) If a confidence interval is given from 8.56 to 10.19 and the mean is known to be 9.375, what is the margin of e...
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