How heavy a load, in pounds, is needed to pull apart pieces of Douglas fir 44 in. long and 1.51.5 in. wide with a standard deviation ?σ of 30003000 lbs? Estimate the mean load ?μ needed to pull apart the pieces of wood to within plus or minus 600600 lbs with 95%95% confidence. Determine how large of a sample size ?n is needed. You might find a table of ?-z-critical values useful. n=

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A: Givensample size(n)=62standard deviation(σ)=0.31Mean(x)=1.25confidence level=87%

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A: Given,sample size(n)=62mean(x¯)=1.25standard deviation(σ)=0.31α=1-0.87=0.13α2=0.065Z0.065=1.5141…

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Q: how many water specimens are required in the sample?

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Q: with all things to do with human speech, the precise duration of this perio sper varies by speaker,…

A: P(X=2)=P2+801210z<2-801210=P(-20.55<z<21.61)=P(z<21.61)-P(z<-20.55)=1-0=1

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Q: A sample of n = 16 scores has a mean of M = 56 and a standard deviation of s = 12. a. Explain what…

A: Given data, n=16 M=56 s=12

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.