Suppose the heights of 18-year-old men are approximately normally distributed, with mean 69 inches and standard deviation 6 inches.   (a) What is the probability that an 18-year-old man selected at random is between 68 and 70 inches tall? (Round your answer to four decimal places.   (b)If a random sample of thirty 18-year-old men is selected, what is the probability that the mean height x is between 68 and 70 inches? (Round your answer to four decimal places.)

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A:

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A: Given data,μ=68σ=3If n=9P(67<X<69)=?

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A:

Q: Ask Your Teacher   Suppose the heights of 18-year-old men are approximately normally…

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A: Hence answer is  62.93%

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A: Given,

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A:

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A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 13.6…

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A:

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A: Given that.   X~N( μ , ?)   μ=3.5 , ?=0.7  , n=81   Z-score =( x - μ )/?

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Q: Ask Your Teacher   A large tank of fish from a hatchery is being delivered to a lake. The…

A:

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.