On weeknights, the average number of hours of sleep per night for adults 55-84 years old is 7.0. Assume this random variable follows a a. What is the probability that a randomly selected adult from this age group will get 1. less than 6.0 hours of sleep tonight? 2. more than 4.0 hours of sleep tonight? 3. between 6.3 and 9.0 hours of sleep tonight? 4. between 5.6 and 6.7 hours of sleep tonight? b. How many hours of sleep will an adult in this age group get if they are in the 20th percentile? a. 1. The probability is (Round to four decimal places as needed.) normal distribution with a standard deviation of 1.3 hours.

MATLAB: An Introduction with Applications
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On weeknights, the average number of hours of sleep per night for adults 55-84 years old is 7.0. Assume this random variable follows a normal distribution with a standard deviation of 1.3 hours.
a. What is the probability that a randomly selected adult from this age group will get
1. less than 6.0 hours of sleep tonight?
2. more than 4.0 hours of sleep tonight?
3. between 6.3 and 9.0 hours of sleep tonight?
4. between 5.6 and 6.7 hours of sleep tonight?
b. How many hours of sleep will an adult in this age group get if they are in the 20th percentile?
a. 1. The probability is.
(Round to four decimal places as needed.)
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Transcribed Image Text:On weeknights, the average number of hours of sleep per night for adults 55-84 years old is 7.0. Assume this random variable follows a normal distribution with a standard deviation of 1.3 hours. a. What is the probability that a randomly selected adult from this age group will get 1. less than 6.0 hours of sleep tonight? 2. more than 4.0 hours of sleep tonight? 3. between 6.3 and 9.0 hours of sleep tonight? 4. between 5.6 and 6.7 hours of sleep tonight? b. How many hours of sleep will an adult in this age group get if they are in the 20th percentile? a. 1. The probability is. (Round to four decimal places as needed.) View an example Get more help - * Clear all
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On weeknights, the average number of hours of sleep per night for adults 55-84 years old is 7.0. Assume this random variable follows a normal distribution with a standard deviation of 1.3 hours.
a. What is the probability that a randomly selected adult from this age group will get
1. less than 6.0 hours of sleep tonight?
2. more than 4.0 hours of sleep tonight?
3. between 6.3 and 9.0 hours of sleep tonight?
4. between 5.6 and 6.7 hours of sleep tonight?
b. How many hours of sleep will an adult in this age group get if they are in the 20th percentile?
a. 1. The probability is 0.2209
(Round to four decimal places as needed.)
a. 2. The probability is 0.9895.
(Round to four decimal places as needed.)
a. 3. The probability is 0.6429.
(Round to four decimal places as needed.)
a. 4. The probability is
(Round to four decimal places as needed.)
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Transcribed Image Text:On weeknights, the average number of hours of sleep per night for adults 55-84 years old is 7.0. Assume this random variable follows a normal distribution with a standard deviation of 1.3 hours. a. What is the probability that a randomly selected adult from this age group will get 1. less than 6.0 hours of sleep tonight? 2. more than 4.0 hours of sleep tonight? 3. between 6.3 and 9.0 hours of sleep tonight? 4. between 5.6 and 6.7 hours of sleep tonight? b. How many hours of sleep will an adult in this age group get if they are in the 20th percentile? a. 1. The probability is 0.2209 (Round to four decimal places as needed.) a. 2. The probability is 0.9895. (Round to four decimal places as needed.) a. 3. The probability is 0.6429. (Round to four decimal places as needed.) a. 4. The probability is (Round to four decimal places as needed.) ew an example Get more help - =4 ... VI More Clear all Check answer X
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