Student's T-Test

T-Test: What It Is With Multiple Formulas and When to Use Them

Z Test vs. T Test | Differences, Formula & Examples - Video | Study.com

Two-Tailed Test in Statistics | Overview, Formula & Example

Z Test vs. T Test | Differences, Formula & Examples

We estimate the relationship between the student-teacher ratio(X1=STR) and test scores (Y=TestScore), controlling for thepercentage of English learners in the classroom (X2=PctEL):TestScore=686.0-1.10*STR-0.65*PctEL The standard error of beta0hatis 8.7. The standard error of beta1hat is 0.43. The standard errorof beta2hat is 0.31. What is the upper bound of the 90% confidenceinterval for a 1-percentage point increase in PctEL? Round to twodecimal places.