The engines made by Ford for speedboats had an average power of 220 horsepower (HP) and standard deviation of 15 HP. A potential buyer intends to take a sample of forty engines and will not place an order if the sample mean is less than 215 HP. What is the probability that the buyer will not place an order?

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A: X~N(μ= 850 , σ= 82 ) μ= 850 , σ= 82 Formula for Z-score Z=(X-μ)/σ

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Q: If the mean height of a population of students is 68 inches with standard deviation 3 inches, what…

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Q: The average weight of an NFL player is 245.7 pounds with a standard deviation of 34.5 pounds, but…

A: From the provided information, Mean (µ) = 245.7 Standard deviation (σ) = 34.5

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A: GivenMean(μ)=120standard deviation(σ)=20

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Q: A manufacturer knows that their items have a normally distributed length, with a mean of 18 inches,…

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Q: According to Neilson & Co adults watch an average of 30 hours of a TV a week. Assume the population…

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Q: Among all monthly bills from a certain credit card company, the mean amount billed was $485 and the…

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Q: A manufacturer knows that their items have a normally distributed length, with a mean of 18.8…

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Q: The average public elementary school has 468 students with a standard deviation of 87. If a random…

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Q: According to an NRF survey conducted by BIGresearch, the average family spends about $237 on…

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Q: An orange juice producer buys all his oranges from a large orange grove. The amount of juice…

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Q: An electrical component is designed to provide a mean service life of 3000 hours, with a standard…

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Q: Traveling between two campuses of a university in a city via shuttle bus takes, on average, 28…

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Q: It is believed that the average shoulder height of Furry Manumars is 16 inches, with a standard…

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A:

Q: Suppose the heights of 18 year old men are approximately normally diatributed, with mean 67 inches…

A: Mean = 67 Standard deviation = 5

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Q: (b) The blood pressure reading for people aged 80 years old that are having high blood pressure is…

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Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 66 inches…

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Q: The diameter of ping-pong balls manufactured by a French company is 1.57 inches with a standard…

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Q: A courier services company has found that the delivery time for packages is normally distributed,…

A: Given : μ = 14 σ = 2 P(12≤X≤15) = P(X≤15) - P(X≤12)  P(12≤X≤15) = PX-μσ≤15-μσ - PX-μσ≤12-μσ…

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 538…

A:

Q: According to the Department of Education, the time college students spend on their cell phones daily…

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Q: According to a report from a business intelligence​ company, smartphone owners are using an average…

A: Given that   μ = 22σ= 7n =144we need to calculateP (21.5 < X < 22.5)

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.