Bivaraite Regression:Testing for Significant Slopes & Intercepts Flashcards
How do you know when a p-value is significant? Which hypothesis do you accept and reject?
p
What will the slope look like if the slope (b) of the Null Hypothesis (H0) is 0?
Horizontal Line
What will be the intercept (a) of the Null Hypothesis be?
0
What does tCV mean?
T-Critical Value
What does a larger Yprediction mean?
Larger Standard Estimated Error (SEe)
What is in between a YPi (Y Prediction Interval)?
real point on the line of best fit
What does a t>tcv mean?
t-test larger than critical value.
Yes? reject Null Hypothesis
No? Accept Null Hypothesis
What does a large t value mean?
likely significant
what does a small t value mean?
not significant
When finding students “t” value what variables are used?
Signal & Noise
What does a large (t) value mean?
large signal (numerator)
What does a small (t)value mean?
large noise (denominator)
What is the equation to find the (t) value when provided the slope (b)?
t = ______slope_______
Standard Error Slope
What is the equation to find the (t) value when provided the intercept (a)?
t = ______slope_______
Standard Error intercept
You will be given the standard error of intercept, but what is the equation for Standard Error for Slope (b)?
SEb = ___________SEe______________
SQRT (x-xbar)^2+(x-xbar)^2 +etc…..
