Refer to Exercise 23.

a. What proportion of subjects who said they saw broken glass at the accident received the “hit” treatment?

b. What percent of subjects who received the “smashed into” treatment said they did not see broken glass at the accident?

Exercise 23.

Researchers asked 150 subjects to recall the details of a car accident they watched on video. Fifty subjects were randomly assigned to be asked, “About how fast were the cars going when they smashed into each other?” For another 50 randomly assigned subjects, the words “smashed into” were replaced with “hit.” The remaining 50 subjects the control group—were not asked to estimate speed. A week later, all subjects were asked if they saw any broken glass at the accident (there wasn’t any). The table shows each group’s response to the broken glass question.

Transcribed Image Text:

Treatment "Smashed into" "Hit" Control Response Yes 16 7 6 No 34 43 44