According to a study, the mean sleeping time of working adults is 6.8 hours a day with a standard deviation of 1.2 hours. Given that the distribution is normal, what is the probability that a randomly selected working adult sleeps more than 8 hours a day? Notes: 1. Write your answer with four decimal places (i.e 0.2621). 2. Do not express your answer in percentage.

Q: A particular fruit's weights are normally distributed, with a mean of 483 grams and a standard…

A: Given, Mean, μ = 483 standard deviation, σ=17  We have , Z = x-μσ

Q: Assume that the hourly costs of operating a commercial aircraft are normally distributed with a mean…

A:

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: According to a recent survey, the salaries of assistant professors have a mean of $40,756 and a…

A: Determine the Z score for the random variable X equals 45,000. The Z score for the random variable…

Q: Assume that weights of men are normally distributed with a mean of 160 pounds and a standard…

A: Given, Weights of men follows normal distribution with mean 160 pounds and standard deviation 25…

Q: According to a government study among adults in the 25- to 34-year age group, the mean amount spent…

A: From the provided information,

Q: The weight of football players is normally distributed with a mean of 200 pounds and a standard…

A: Given,mean(μ)=200standard deviation(σ)=25

Q: 2. a. The Intelligence Quotient (IQ) of adults is approximately normally distributed with mean 100…

A: Given that

Q: A study found out that for a particular area, the average income per family is $24596 and the…

A: Solution

Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…

A: To get the proportion of professor who earn more than $48,000 we proceed as follows…

Q: minutes. What percentage of his commutes will be between 13 and 26 minutes, to the nearest tenth?

A: Let X be the random variable that amount of time to arrive. Given that, X~N(μ=23,σ=5)

Q: The mean height for women in the United States is approximately 64.5 inches with a standard…

A: Formula : Z =(X - μ)/σ

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: The length of a fully grown hibiscus plants is normally distributed and has a mean of 35cm and a…

A: Given that,Mean(μ)=35standard deviation(σ)=4     The random variable  is length of fully grown…

Q: A set of exam scores is normally distributed and has a mean of 79.3 and a standard deviation of 7.4.…

A: Given datanormal distribution μ=79.3σ=7.4choose a random score less than or equal to this 0.0078we…

Q: The body temperatures of adults are normally distributed with a mean of 98.6° F and a standard…

A: Percentile:The percentile is the proportion of data lying below a certain value. For example, 56…

Q: om's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.  The…

A: Given that  The residence in Carmel to the IUPUI campus has a normal distribution.  Standard…

Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…

A:

Q: Write the steps of calculating the population standard deviation.

A: Standard deviation: The standard deviation is based on how much each observation deviates from a…

Q: people where sampled and their heights were recorded, it was discovered mean height was 5 feet and…

A: Given that  Population mean μ =5 feet 6.3 inches =66.3 1feet=12 inches  5feet=12×5=60+6.3=66.3…

Q: There is an average of 4 accidents in a week on a major highway in the city. What is the standard…

A:

Q: In 1974, the mean height of a woman in the United States was 63.7 inches, with a standard deviation…

A: given data normal distribution μ = 63.7σ = 2.5P(x>z) = 0.88x = ?

Q: Suppose your favorite coffee machine offers 6 ounce cups of coffee. The actual amount of coffee put…

A:

Q: These babies will have a mass of less than how many pounds?

A: Given that masses of newborns are normally distributed with a mean of 6.6 lbs. and a standard…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Given ,       Mean,μ =267standard deviation,σ=45using formula,Z-score = x-μσ

Q: The weights of the native North American Blue Jay have a mean of 18.4 ounces with a standard…

A:

Q: The mean value of land and buildings per acre from a sample of properties is $11,800, with a…

A: The objective of this question is to find the range of values within which approximately 99.7% of…

Q: As of 2020, 83 pitchers have been inducted into the Major League Baseball Hall of Fame. The…

A: Given that, The number of winning games pitchers played is approximately normal with a mean of 250…

Q: The average cost of a car rental is $0.32 per mile.  The standard deviation is $0.03.  Using…

A: Range = μ - kσ ,  μ + kσ

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of 470…

A:

Q: Suppose that heights of women in Utah are normally distributed with a mean of 74 inches and a…

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Q: A successful basketball player has a height of 6 feet 6 ​inches, or 198 cm. Based on statistics from…

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Q: If the students make one more measurement using the same equipment and procedures, what is the…

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Q: use an ti84 device to solve.  The head of maintenance at XYZ Rent-A-Car believes that the mean…

A: Given: Mean μ=4959 Standard deviation σ=448 Sample size n=43

Q: 3. We know that heights of U.S. adult females is approximately normal with a mean of about 64 inches…

A: Given that heights of U.S. adult females is approximately normal with a mean of about 64 inches and…

Q: The average score of all golfers for a particular course has a mean of 61 and a standard deviation…

A: