 # winkelermd45

## Recently Published ##### Regression of Bed Lowering Plot
Relationship between lowering of streambed and dam removal. regression abline is displayed as forest green. The legend has the other information. ##### Linear Least squares Plot
Residuals: Min 1Q Median 3Q Max -1.44350 -0.49350 0.09426 0.44426 1.50413 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) -2.07064 0.38306 -5.405 0.00012 *** Yrs -0.16698 0.02617 -6.381 2.41e-05 *** --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Residual standard error: 0.8448 on 13 degrees of freedom Multiple R-squared: 0.758, Adjusted R-squared: 0.7394 F-statistic: 40.72 on 1 and 13 DF, p-value: 2.414e-05 ##### Theil-SEN Solid, regression is dashed Plot
Exercise 10.2 tau = 0.7333333. True Tau is NOT equal to zero. %95 confidence level, LCL = -10 Theil slope = 10 UCL = 85 ##### Normal Q-Q Plot 4
Drainage vs Increased streamflow. So, variance of residuals does NOT vary with the fitted values and appear to follow a normal distribution. This model should mee the require assumptions. ##### Drainage Area and Q90 version 2 Plot
Using log transformation , to the y variable, we can observe a linear relationship. Although we now need to perform a bias correction to Q90 values. The bias correction needs to be performed to make sure no underestimation of the Observed Q90 values ##### Non linear Plot
Relationship--Non-Linear--Totally Dissolved Solids & Uranium Using Spearman's rank correlation I found out that there is a positive indication that High uranium concentrations tend to relate to TDS(Total Dissolved Solids). Although there is a WEAK relation given the Spearman's rho correlation coefficient (rho = 0.11). However----- Using Kendall's rank correlation tau we can reject the null hypothesis that relationship between Uranium and TDS- is not significant. ##### Permutation Test of Difference Between 2 Group Means
Data: downgradient and Up gradient . Tis is a two-sided alternative test using the Wilcoxon rank sum test with continuity correction. The vertical line represents the difference of the observed means. the rank and sum test; plus the permutation test on the means will find the difference in the two groups.