STAT 341 Exam 1 with Complete Solutions
Rated A+
PI Definition ✔✔ Interval for true value of y given new x observation
Is CI narrower or wider than PI for same x ✔✔ CI is narrower than PI
95% PI Interval Interpretation ✔✔ There is 95% probability the interval contains a new observation with
x as predictor value
SStot Formula / df ✔✔ SSres + SSreg
df tot = n - 1
R^2 Formula ✔✔ 1 - SSres/SStot
R^2 Interpretation ✔✔ % of the variability in Y is explained by X
F-statistic Formula ✔✔ f = MSreg/MSres
MSreg formula ✔✔ SSreg/df reg
df reg = k
MSres Formula ✔✔ SSres/df res
df res = n-p
What is an F-Test ✔✔ A t-test for multiple covariates
SLR Theoretical Model ✔✔ Yi = B0 + B1xi + ei
Rated A+
PI Definition ✔✔ Interval for true value of y given new x observation
Is CI narrower or wider than PI for same x ✔✔ CI is narrower than PI
95% PI Interval Interpretation ✔✔ There is 95% probability the interval contains a new observation with
x as predictor value
SStot Formula / df ✔✔ SSres + SSreg
df tot = n - 1
R^2 Formula ✔✔ 1 - SSres/SStot
R^2 Interpretation ✔✔ % of the variability in Y is explained by X
F-statistic Formula ✔✔ f = MSreg/MSres
MSreg formula ✔✔ SSreg/df reg
df reg = k
MSres Formula ✔✔ SSres/df res
df res = n-p
What is an F-Test ✔✔ A t-test for multiple covariates
SLR Theoretical Model ✔✔ Yi = B0 + B1xi + ei
