Math 221 week 5 quiz - Study guides, Class notes & Summaries
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MATH 302 Final Exam QUESTIONS & ANSWERS 2022 UPDATE - American University
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MATH 302 Final Exam QUESTIONS & ANSWERS 2022 UPDATE - American UniversityMATH 302 Final Exam 2022 - American University 
 
 
QUIZ 1 
 
 
Question 1 of 20	1.0/ 1.0 Points 
Which of the following statements are false regarding a boxplot? 
A.	The height of the box has no significance. 
B.	Boxplots can be used to either describe a single variable in a data set or to compare two (or more)variables 
 
C.	The length of the box equals the range of the data. 
 
D.	The right and left of the box are the t...
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MATH-221 Week 5 Quiz (v4) | 100 out of 100 | Best SCORE Paper
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Question: Let x represent the number of cars in a parking lot. This would … what type of variable: 
Question: Let x represent the height of corn in Oklahoma. This would … what type of variable: 
Question: If you created the probability distribution for these data, what would … the probability of 40-49? 
Question: Consider the following table. Find the mean of this variable. 
Question: Consider the following table. Find the variance of this variable. 
Question: Consider the following table....
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MATH 221 WEEK 6 QUIZ (100% CORRECT ANSWERS) | (GRADED A) Question and answer Solution | DeVry University.
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(CO 5) A company claims that its heaters last more than 5 years. Write the null and 
alternative hypotheses and note which is the claim. 
Ho: μ = 5 (claim), Ha: μ ≥ 5 Ho: μ > 5 (claim), Ha: μ ≤ 5 
Correct Answer 
 
 
 
Ho: μ ≤ 5, Ha: μ < 5 (claim) 
 
 
(CO 5) An executive claims that her employees spend no less than 2.5 hours each 
week in meetings. Write the null and alternative hypotheses and note which is the claim. 
 
Ho: μ ≤ 2.5 (claim), Ha: μ > 2.5 
Correct Answer ...
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MATH 221 Week 5 Quiz
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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 40-49? 
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 Quiz
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1.	Question: (CO 4) From a random sample of 68 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? 
2.	Question: (CO 4) If a confidence interval is given from 8.52 to 10.23 and the mean is known to be 9.375, what is the maximum error? 
3.	Question: (CO 4) Which of the following is most likely to lead to a small margin ...
Too much month left at the end of the money?
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MATH-221 - Week 5- Quiz
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MATH-221 - Week 5- Quiz 
Book: Chan, C. et al. (2022). Statistics for Decision Making (3rd ed.). zyBooks, A Wiley Brand. 
Course: (MATH 221) Statistics for Decision-Making - 61204
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Exam (elaborations) MATH221 Graded week 7 quiz (MATH221)MATH 221 Week 7 Quiz
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(TCO 6) In the standard normal distribution, the standard deviation is always 
Student Answer:	 0 
 1 
 2 
 none of these 
 
 
 2.	Question :	(TCO 6) The area under a normal curve with mu = 8 and sigma = 3 is 
Student Answer:	 0 
 1 
 2 
 none of these 
 
 
 3.	Question :	(TCO 6) If Larry gets a 70 on a physics test where the mean is 65 and the standard deviation is 5.8, where does he stand in relation to his classmates? 
Student Answer:	 He is in the top 10%. 
 He is in the top 20%. 
 He is i...
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MATH 221 WEEK 7 QUIZ (100% CORRECT ANSWERS) | DeVry University.
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MATH 221 WEEK 7 QUIZ 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 standar d deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? Correct! (5.71, 5.89) (5.73, 5.87) (5.72, 5.88) (5.74, 5.90) Question 2 2 / 2 pts (CO6) If a confidence interval is given from 8.52 to 10.23 and the mean is known to be 9.375, what is the marg...
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MATH221 Week 7 Quiz (100% CORRECT ANSWERS).
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MATH 221 Week 7 Quiz Question 1 (CO 4) 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 deviat ion of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? (5.74, 5.90) (5.71, 5.89) (5.73, 5.87) (5.72, 5.88) Question 1 (CO 4) From a random sample of 68 businesses, it is found that the mean time that employees spend on personal issues each week is 5.8 hour...
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MATH 221 Week 6 Quiz (GRADED A) Questions and Answer Elaborations | DeVry University
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. MATH 221 Week 6 Quiz A consumer analyst reports that the mean life of a certain type of alkaline battery is more than 63 months. Write the null and alternative hypotheses and note which is the cl aim. Ho: μ ≤ 63, Ha: μ < 63 (claim) Ho: μ > 63 (claim), Ha: μ ≤ 63 Ho: μ = 63 (claim), Ha: μ ≥ 63 Ho: μ ≤ 63, Ha: μ > 63 (claim) A business claims that the mean time that customers wait for service is at most 9.2 minutes. Write the null and alternative hypotheses and note whic...
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