12. What is the probability that Buffalo State smokers spend between $20 and $21? [Answer: A) 0.57% B) 5.57% C) 8.08% D) 41.92% 13. What is the probability that Buffalo State smokers spend more than $21? A) 0.57% B) 5.57% C) 8.08% D) 41.92% 14 What is the probability that the sample mean is greater than $10? [Answer: Answer:
12. What is the probability that Buffalo State smokers spend between $20 and $21? [Answer: A) 0.57% B) 5.57% C) 8.08% D) 41.92% 13. What is the probability that Buffalo State smokers spend more than $21? A) 0.57% B) 5.57% C) 8.08% D) 41.92% 14 What is the probability that the sample mean is greater than $10? [Answer: Answer:
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Please do 12-15 and explain every step so I can understand the process.
![[Questions 10-15] Suppose a research firm conducted a survey to estimate the average amount of money
steady smokers spend on cigarettes during a week. The research reported that on average U.S. smokers
spend $20 per week and the population standard deviation is $5. Given this result, you've selected a
sample of 49 steady smokers who are attending Buffalo State.
10. We can safely assume that the selected sample is normally distributed, because: [Answer:
A) the population always follows the normal probability distribution.
B) the population standard deviation is known.
C) the size of the sample is large enough.
D) the distribution of the population is unknown.
11. What is the z-value corresponding to $21?
A) 0.20 B) 1.00 C) 1.40 D) Unknown
12. What is the probability that Buffalo State smokers spend between $20 and $21? [Answer:
A) 0.57% B) 5.57% C) 8.08% D) 41.92%
13. What is the probability that Buffalo State smokers spend more than $21?
A) 0.57% B) 5.57% C) 8.08% D) 41.92%
14. What is the probability that the sample mean is greater than $19?
A) 8.08% B) 41.92% C) 83.84% D) 91.92%
[Answer:
15. What is the probability that Buffalo State smokers spend less than $19?
A) 8.08% B) 41.92% C) 83.84% D) 91.92%
[Answer:
[Answer:
]
]
]
]
]
[Answer: ]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4cc4fb4a-23f5-4110-9e16-75ef5a899c17%2Fe04663f6-9ee7-422c-a14c-58f1571328d7%2Fs5xjtw_processed.png&w=3840&q=75)
Transcribed Image Text:[Questions 10-15] Suppose a research firm conducted a survey to estimate the average amount of money
steady smokers spend on cigarettes during a week. The research reported that on average U.S. smokers
spend $20 per week and the population standard deviation is $5. Given this result, you've selected a
sample of 49 steady smokers who are attending Buffalo State.
10. We can safely assume that the selected sample is normally distributed, because: [Answer:
A) the population always follows the normal probability distribution.
B) the population standard deviation is known.
C) the size of the sample is large enough.
D) the distribution of the population is unknown.
11. What is the z-value corresponding to $21?
A) 0.20 B) 1.00 C) 1.40 D) Unknown
12. What is the probability that Buffalo State smokers spend between $20 and $21? [Answer:
A) 0.57% B) 5.57% C) 8.08% D) 41.92%
13. What is the probability that Buffalo State smokers spend more than $21?
A) 0.57% B) 5.57% C) 8.08% D) 41.92%
14. What is the probability that the sample mean is greater than $19?
A) 8.08% B) 41.92% C) 83.84% D) 91.92%
[Answer:
15. What is the probability that Buffalo State smokers spend less than $19?
A) 8.08% B) 41.92% C) 83.84% D) 91.92%
[Answer:
[Answer:
]
]
]
]
]
[Answer: ]
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