Use the​ F-scale measurements of tornadoes listed in the accompanying table. The range of the data is 4.0. Use the range rule of thumb to estimate the value of the standard deviation. Compare the result to the actual standard deviation of the​ data, 1.1​,assuming a difference of 0.3 or greater would mean a significant difference. A. Using the range rule of​ thumb, the standard deviation is approximately ​(Type an integer or decimal rounded to one decimal place as​ needed.)

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A: For the given data find ( a ) Mean =? ( b ) Standard deviation = ?

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A:

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A: Solution

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A:

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A: Let X be IQ score  from normal distribution with mean (μ) = 100 and standard deviation (σ) = 15

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Q: Use the range rule of thumb to estimate the standard deviation. Round results to the nearest tenth.…

A: Range = Maximum - Minimum

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Given,mean(μ)=100standard deviation(σ)=15and z-score=0.7

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Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Mean()=100standard deviation()=15

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A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

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A: Given information Mean = 100 Standard deviation = 15 P(X > x) = 0.65 P(X < x) = 1 – 0.65 =…

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

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A:

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A: We have given that Mean (x̅) = 78Standard deviations (s) = 22.6

Q: Use the F-scale measurements of tornadoes listed in the accompanying table. The range of the data is…

A: The range of the data is 4.0.

Q: .... The indicated IQ score, x, is (Round to one decimal place as needed.)

A:

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A: Standard deviation(s)=2.3 miles

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A:

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Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Given: Mean μ = 100 Standard deviation σ = 15 Formula Used: Z = X-μσX = μ+Zσ

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Q: Find the indicated IQ score. The graph to the right depicts IQ scores of​ adults, and those scores…

A: Given info: IQ scores of​ adults are normally distributed with a mean of 100 and a standard…

Q: Use the F-scale measurements of tornadoes listed in the accompanying table. The range of the data is…

A: The provided information are: Range = 3 Actual standard deviation = 1

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A: Solution: Population 1 :Subjects with medium lead levels  Population2: Subjects with high lead…

Q: X. IQ Scores Medium Lead Level O High Lead Level 72 n2 11 84 92 X2% D 88.555 85 87 S2 = 10.083 %3D…

A:

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: