Slopes
Given scatterplot data points are uniformly distributed across all values of X without any discernible upward or downward trend, what could one predict regarding significance testing for regression model slope?
In a t-test for slope, what is being tested?
When should you perform hypothesis testing for significance of the slope in linear regression?
Which factor would NOT indicate the need to reassess an existing regression model between time spent studying and final grades?
What is the purpose of a t-test for the slope in a regression model?
When establishing causation based on regression analysis in an observational study, which assumption must be critically evaluated before making causal claims?
What symbol represents the estimated slope in simple linear regression analysis?
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If researchers want to determine if there’s an increase in test scores with increased study time using regression analysis, what would be their alternative hypothesis (Ha)?
If the null hypothesis states that there is no linear relationship between the number of hours studied and final exam scores, and a student's regression analysis yields a high t-value for the slope with a very low p-value, what can be inferred about the alternative hypothesis?
If you want to determine whether there's evidence that an independent variable predicts an outcome, what would you assess?