Guide To Design And Analysis Pdf — Quasi-experimentation A

Hartley laughed. "You quasi-people have a workaround for everything."

"Exactly," Lena said. "And next time, if you can’t randomize, use a — give half the classes the software in Phase 1, the other half in Phase 2. Compare each against itself over time." quasi-experimentation a guide to design and analysis pdf

Result: The +7 points was statistically significant (p < .01) and practically meaningful. Lena presented to Hartley: "The software works, but only by 7 points, not the 15-point jump you saw in the raw comparison. The raw difference was inflated by Ms. Chen’s prior excellence." Hartley laughed

Hartley frowned. "So I should flip a coin? Randomly assign kids to software or no software?" " Lena said. "And next time