Dr. rajah is studying the effects of a new drug on cognitive performance. after random assignment of
groups, one group takes the drug while the other takes a placebo. afterward, both groups do a series of
timed brain teasers and are scored on performance. dr. rajah finds a significant difference between the two
groups. does his experiment have external validity?

Drag the tiles to the correct boxes to complete the pairs. match the errors with their definitions. #name #value #ref when a formula produces output that is too lengthy to fit in the spreadsheet cell arrowright when you enter an invalid cell reference in a formula arrowright when you type text in cells that accept numeric data arrowright when you type in a cell reference that doesn’t exist arrowright reset next