The duration of childbirths are normally distributed. The mean is 268 days with a standard deviation amounting to 15. What is the probability of a childbirth that lasts less than 250 days? * 0.0606 0.1591 0.1151 0.0066
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A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?
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A: Given average (μ)=8000 standard deviation (σ)=500 Find P(X<6300)=?
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A: Given data,μ=90σ=10P(X>95)=?
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A: A normal distribution (X) has a mean of 100 and a standard deviation of 10.
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A: From the provided information, Mean (µ) = 161 Standard deviation (σ) = 4.56 X~N (161, 4.56)
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A: Given data,μ=0.4σ=0.02P(X>0.418)=?
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A: Denote X as the life of a randomly selected light bulb.
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A: Here, mean is 5 and standard deviation is 3. We will use z-standard normal distribution.
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A: Answer: From the given data, mean (μ) = 515 Standard deviation(σ) = 37 X~ Norma distribution(μ,σ)
Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 33 hours…
A: Answer: From the given data, Mean (μ) = 510 Standard deviation (σ) = 33 X~ Normal distribution (μ,σ)
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A: Solution: Let X be the weight of all 5 pound bags of flour. From the given information, X follows…
Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is…
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Q: SAT tests have a mean of 500 and a standard deviation of 100. They are normally distributed. Amy got…
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Q: The heights of students are normally distributed with mean 161 inches and standard deviation of 4.56…
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- Assume that people playing World of Warcraft in a week has a normal distribution with a mean of 54 hours and a standard deviation of 11 hours. Find the probability that a randomly selected person played more than 89 hours. Round to four decimals places.According to the latest internet usage survey of college students, the amount of time spent on social media per day is normally distributed with a mean equal to 210 minutes and a standard deviation of 45 minutes. Based on this survey, find the probability that the amount of time spent on social media by college students is between 150 and 300 minutes per day. Round answer to 4 decimal places.Trucks in a delivery fleet travel a mean of 100100 miles per day with a standard deviation of 3535 miles per day. The mileage per day is distributed normally. Find the probability that a truck drives less than 148148 miles in a day. Round your answer to four decimal places.
- Annual precipitation in a certain city is normally distributed with a mean of 99 inches, and a standard deviation of 18 inches. Find the probability that the mean annual precipitation during 35 randomly picked years will be less than 101.8 inches.The length of a ball pen is known to be normal with mean 5 inches with a standard deviation of 0.1 inch. Desiree bought one of such a ball pen. What is the probability that its length is between 4.85 inches to 5.10 inches? Solve and illustrate in the Normal curve.The life of light bulbs is distributed normally. the standard deviation of the lifetime is 29 hours and the mean lifetime of a bulb is 590. Find the probability of a bulb lasting for at most 608 hours (round your answer to four decimal places)
- The life of light bulbs is distributed normally. The standard deviation of the lifetime is 26 hours and the mean lifetime of a bulb is 570. Find the probability of a bulb lasting for at least 603 hours (Round your answer to four decimal places) CS Scanned with CamScannerSAT exam math scores are normally distributed with mean 523 and standard deviation 89. Give the probability a test taker will score between a 500 and 600 on the math portion of the SAT. round to four decimal places.The annual income for a sample of 450 part-time students is normally distributed with a mean income of $31,000 and a standard deviation of $3,000. What is the probability their annual income is $22,000-$28,000? Do not use Excel Use Z SCORE
- The average number of dropouts for a school district has been 300 per year with a standard deviation of 50. What is the probability that the number of dropouts next year will be: less than 250? less than 300? more than 350?College students average 7.1 hours of sleep per night with a standard deviation of 35 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 8.1 hours? Probability =