Ervin determined the amount of CaCO3 (as ppm) in their municipality water.  Based on his results are the following:                    155, 165, 138, 172, 127, 193, 142.  What is the sample standard deviation of data?

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A: Solution: Given information: n1= 33n2= 35x1= 26.78x2= 23.16σ1= 6.29σ2= 7.52

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A: Please see below

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A: here use z-score formula  z-score = x- μσ

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A: Given : Sample size = 80 Sample proportion = 0.05

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Q: Ch.8 Proportions  #1 In a survey of 471 randomly selected gun owners, it was found that 85 of them…

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Q: Source DF MS F P Regression 1 45.154 45.154 40.38 0.000 Residual Error 7 7.827 1.118 Total 8 52.981…

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A: The level of significance is 0.01.

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Q: proportions question 10 Giving a test to a group of students, the grades and gender are summarized…

A: Given that  Giving a test to a group of students, the grades and gender are summarized below…

Q: An article in Wood Science and Technology ("Creep in Chipboard, Part 3: Initial Assessment of the…

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Q: Part 3: Interpretation of OLS regression Consider the following OLS regression output which is…

A: Solution: The regression output is given.

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