The mean length of lumber is supposed to be 8.5 feet. A builder wants to check whether the shipment of lumber she receives has the correct length, so she conducts a hypothesis test. She measures 61 randomly selected pieces of lumber and finds they have a mean of 8.3 feet and standard deviation of 0.75 feet. Using R Studio Conduct a hypothesis test to see whether she is justified to believe that the average is shorter than 8.5 feet?

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given that:

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A:

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A: old mean for 12 students = 6.7 sum of 12 students = 6.7*12 = 80.4

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Q: video game c

A: given, sample size(n) = 1500 sample mean (x̄) = 115 sample stadard deviation (s) = 11

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A: Population standard deviation, σ =3 inches Sample size n=6

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A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 6.9 Sample standard deviation…

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A: Given that  Sample size n =32 Sample mean =1237 Standard deviation =45

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A:

Q: A study conducted by the Center for Population Economics at the University of Chicago studied the…

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A: GivenDeAndre earn in science=81.2Jonah earn in Art History=61.9For science Mean(μ)=72.2standard…

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A: Given : μ = 16 , σ= 8 and n= 75