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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 ...
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 ...
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.
The New York Jets interviewed Washington Commanders defensive coordinator Joe Whitt Jr. on Sunday for their head coach vacancy. Whitt is in his first season leading the defense for the Commanders ...
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.
The scents of cinnamon and star anise add big flavors to this quick soup. Butter adds body and a silky texture. Fresh udon noodles take only a few minutes to cook, but dry udon noodles work well ...
The transformation suggested by Cochrane and Orcutt disregards the first observation of a time series, causing a loss of efficiency that can be substantial in small samples. [3]
A recruitment campaign to find a new chief constable for Humberside has started again, five months after the force failed to receive a single application for the role.