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From the t-test, the difference between the group means is 6-2=4. From the regression, the slope is also 4 indicating that a 1-unit change in drug dose (from 0 to 1) gives a 4-unit change in mean word recall (from 2 to 6). The t-test p-value for the difference in means, and the regression p-value for the slope, are both 0.00805. The methods ...
The Sobel test is basically a specialized t test that provides a method to determine whether the reduction in the effect of the independent variable, after including the mediator in the model, is a significant reduction and therefore whether the mediation effect is statistically significant.
In statistics, Welch's t-test, or unequal variances t-test, is a two-sample location test which is used to test the (null) hypothesis that two populations have equal means. It is named for its creator, Bernard Lewis Welch , and is an adaptation of Student's t -test , [ 1 ] and is more reliable when the two samples have unequal variances and ...
Retired kicker Martin Gramatica of the Tampa Bay Buccaneers watches pregame ceremonies during a game against the San Francisco 49ers Dec. 15, 2013, at Raymond James Stadium in Tampa, Fla.
Heart disease is the No. 1 cause of death in the U.S. Yet, according to the American Heart Association, half of Americans are unaware of this sobering statistic. The good news is that a diet ...
Quest for the Best. Kraft introduced its iconic macaroni and cheese boxed dinner way back in 1937, but these days, Kraft faces plenty of competition from grocery store versions of this family ...
In statistics, the Glejser test for heteroscedasticity, developed in 1969 by Herbert Glejser, regresses the residuals on the explanatory variable that is thought to be related to the heteroscedastic variance. [1]
Getting Isaac Paredes and 3B prospect Cam Smith from the Cubs in the Kyle Tucker trade would seem to signal that the Astros are preparing for Life After Bregman – but doesn't preclude a reunion.