What is the probability that this school functioned more than 7 hours per day?

Q: The age of professional racecar drivers is normally distributed with a mean of 38 and a standard…

A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: If the mean time spent doing this homework assignment was 47.3 minutes with a standard deviation of…

A: Mean = 47.3 Standard deviation = 5.8

Q: The average amount of time to finish this quiz is 26 minutes with a standard deviation of 1.2…

A: Consider the given information.

Q: CNNBC recently reported that the mean annual cost of auto insurance is 1010 dollars. Assume the…

A: Given,mean(μ)=1010standard deviation(σ)=266sample size(n)=78

Q: According to the Department of Education, college students spend an average of 270 minutes per day…

A: The probability that students spent less than 230 minutes on their phone that day is obtained below:…

Q: Let's assume that 6 weeks old golden retriever puppies' weights are normally distributed with a mean…

A: Answer: From the given data, Let X: Weight of puppies Mean μ = 8.1 Pounds Standard deviation σ = 1.3…

Q: The number of defective electronic gadgets leaving a production line daily is known to be normally…

A: Given : The number of defective electronic gadgets leaving a production line daily is known to be…

Q: The average lifetime of light bulbs produced by a particular device is 1,200 hours and their…

A: Given Information: Mean μ=1200 Standard deviation σ=400 Population distribution is normal. Sample…

Q: The mean age that cats get adopted at a shelter is 21.4 months with a standard deviation of 3.6…

A: Normal distribution is also known as the Gaussian distribution . It is widely used in statistics .

Q: According to the records, the amount of precipitation in a certain city I don't November day has a…

A: According to records, the amount of precipitation in a certain city on a November day has a mean of…

Q: Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean…

A: Given , Mean ( μ ) = 111 standard deviation (σ)  = 10.

Q: The amount of tea leaves in a can from a particular production line is normally distributed with…

A: From the provided information,

Q: A company makes batteries that have life spans with a mean of 3000 hours and standard deviation of…

A: From the given information, Sample size (n) = 85 Mean (µ) =3000 Standard deviation (σ) =70 Consider,…

Q: The number of cell phone minutes per month used by a collage student follows a normal distribution…

A: To solve this problem, we first need to standardize the given values using the standard normal…

Q: A factory manufactures car tyres that have an average lifetime of 45256 kilometers with a standard…

A: Solution: Let X be the lifetime of the tyres. From the given information, X follows normal…

Q: An electrical firm manufactures light bulbs that have a life, before burn-out, thatis normally…

A:

Q: The lifetime of lightbulbs that are advertised to last for 3500 hours are normally distributed with…

A:

Q: The time spent in days waiting for a heart transplant can be approximated by a normal distribution…

A: Given information- Population mean, μ = 127 days Population standard deviation, σ = 23.5 days Since…

Q: Find the probability that a bulb burns between 780 and 834 hours

A: Let X denote the length of life of electric bulbs. Given that X follows N(mean = 850, SD = 40), then…

Q: Let's assume that 6 weeks old golden retriever puppies' weights are normally distributed with a mean…

A: Answer: From the given data, mean (μ) = 8.1 Standard deviation (σ) = 1.3 X~Normal distribution(μ,σ)

Q: The annual precipitattion amounts in a certain mountain range are normally distributed with a mean…

A:

Q: The distribution of hourly wages of employees of the TNON company obeys a normal law whose average…

A: Mean Standard deviation

Q: The time taken in the cycling phase of a triathlon has a mean 23.16min and standard deviation…

A: The objective of this question is to find the probability that the mean cycling time taken by a…

Q: The average number of miles driven each day by a group of drivers is 20.7 miles with a standard…

A: μ = 20.7 σ = 6.5 N = 50 P ( 19.4 < x̅  < ( 22.5 ) = ?

Q: The time taken in the cycling phase of a triathlon has a mean 23.16min and standard deviation…

A: The objective of this question is to find the probability that the mean cycling time taken by a…

Q: According to Facebook, daily time spent on Facebook of average user is normally distributed with the…

A:

Q: The tread life of a particular brand of tire is a random variable best described by a normal…

A:

Q: The time for a student to commute from home to a university campus is Normally distributed with a…

A: It is given that the mean is 25 minutes and the standard deviation is 10 minutes.

Q: The Centers for Disease Control report that the total cholesterol levels for women, age 20-29, are…

A: Given, Mean = 183 Standard deviation = 37.2 Sample size = 30   The objective to is find the…

Q: The lengths of pregnancies of humans are normally distributed with a mean of 238 days and a standard…

A: Obtain the standard z-score for the random variable X equals 220. The standard z-score for the…

Q: According to data from the U.S. Army the average foot length of women as normally distributed with a…

A:

Q: The average amount of calories from a hamburger serves in a restauranr is 220 per order with a…

A: Given that  μ = 220 , ? = 30 , n =20

Q: The migratory habits of zebra in the savanna are normally distributed with a mean of 238 days and a…

A: From the provided information, Mean (µ) = 238 days Standard deviation (σ) = 13 days