The United States Forest Service is interested in determining the percentage of acreage in Yosemite that would fall below a certain threshold of trees per acre so that they might estimate how many new trees to buy in order to make sure all of Yosemite is considered well-forested. The distribution of trees per acre in Yosemite is approximately Normal with a mean of 45 trees per acre and a standard deviation of 3 trees per acre. A tree per acre count below 39 is considered understocked for a forest. Roughly what percentage of acres in Yosemite would you say is "understocked"? 95% 0.3% 2.5% 5% 0.15%

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A:

Q: A) A bell-shaped distribution has a mean ?=1200 and standard deviation ?=340.  Find the proportion…

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Q: f a data set has an even number of observations, the median   a. can not be determined   b. is the…

A: Median:   It is nothing but divides the observations into two equal parts and represents the middle…

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Q: A data set with an unknown distribution has mean ?=360 and standard deviation ?=20.  State Chebyshev…

A: Given , μ = 360 , σ = 20

Q: or a distribution, the mean is 100 and the standard deviation is 4.  If a data value x has a value…

A: Given data,Mean μ=100sd σ=4If x=90z=?

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A: Given that : For Women Standard deviation =2.6 inch μ=63.2 inch For men : Standard deviation =3.5…

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A:

Q: A cholesterol drug company wants to market their drug to women if their cholesterol is in the top…

A: Solution: Let X be the cholesterol level. From the given information, X follows normal distribution…

Q: Suppose that the lengths of pregnancies are normally distributed with a mean of 274 days and a…

A: The provided information is  µ=274 σ=10 P(X>280) P(X-µσ>280-27410)=P(z>0.6000)=0.2743 (from…

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A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: Given the mean of a normally distributed data set is 25, with  standard deviation of 5, what percent…

A: We will standardize the normal variable and then use standard Normal table to find the required.

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Q: obiles? Assume the samples are random and independer dard normal distribution table. dard normal…

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Q: The Virginia Cooperative Extension reports that the mean weight of yearling Angus steers is 1152…

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Q: The heights of 1,000 college students are normally distributed about a mean value of 170…

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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.