[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% [Answer: 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: [Answer: ] ] ] ] -]

MATLAB: An Introduction with Applications
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[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: ]
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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