Mathematics, 17.04.2020 03:28, khalilattalah
Regression methods were used to analyze the data from a study investigating the relationship between compressive strength (x) and intrinsic permeability (y) of various concrete mixes and cures. Summary quantities were n=20, LaTeX: \sum y_i∑ y i=572, LaTeX: \sum y_i^2∑ y i 2=23,530, LaTeX: \sum x_i∑ x i=43, LaTeX: \sum x_i^2∑ x i 2=157.42 and LaTeX: \sum\left(x_i\times y_i\right)∑ ( x i × y i )=1697.80. 1. Calculate the least squares estimate of the slope of the regression line. (2 pts) 2. Calculate the least square estimate of the intercept of the regression line. (2 pts) 3. Calculate the error sum of square, SSE. (2 pts) 4. Estimate the variance of the error term, LaTeX: \epsilonϵ. (2 pts) 5. Suppose that the observed value of permeability at x= 3.5 is y=41. Calculate the value of the corresponding residual e. (2 pts)
Answers: 2
Mathematics, 21.06.2019 20:00, oofoofoof1
Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189
Answers: 1
Regression methods were used to analyze the data from a study investigating the relationship between...
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Mathematics, 22.01.2020 02:31
Mathematics, 22.01.2020 02:31