Candy_Questions_06_Post

# Candy_Questions_06_Post - [Review Candy Questions for Exam...

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[Review Candy Questions for Exam 1] 19a . Given : You take 20 length measurements of a strut. You calculate x = 8.28 cm and S = 0.43 cm. The true value is 8.26 cm. To do : Calculate the systematic error. Solution : 19b . Given : You take 20 length measurements of a strut. You calculate x = 8.28 cm and S = 0.43 cm. The true value is 8.26 cm. To do : Calculate the 95% confidence interval for the population mean. In other words, we would estimate the population mean as μ = 8.28 +/- ___________ cm. Solution : 20 . Given : A company produces parts for motorcycles by the thousands, and Jonathan is in charge of quality control. He picks 30 parts at random as sample 1, and calculates the mean, 1 x . He picks 30 other parts as sample 2, and calculates the mean, 2 x . Jonathan continues to do this until sample 20, and calculates the mean, 20 x . The average of all the means is ( ) 11 2 2 0 ... /20 13.55 mm xx x x =+ + + = . The sample standard deviation of all the means is 0.22 mm x S = . To do : Estimate the population standard deviation, σ . Give your answer in mm to three significant digits.

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## This note was uploaded on 07/23/2008 for the course ME 345 taught by Professor Staff during the Spring '08 term at Penn State.

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Candy_Questions_06_Post - [Review Candy Questions for Exam...

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