Sasha was interested in the extent to which people are prepared to intervene to help a stranger and whether the race of the stranger is relevant to the likelihood of intervention. She hired four male actors: one of African ancestry, one of Asian ancestry, one of European ancestry, and one of Indian ancestry. The actors were each told to fake a fall in a busy shopping street and pretend to be in some pain. Sasha observed from nearby and recorded whether, within five minutes of the actors fall, anyone had stopped to see if he was okay. Each actor repeated the experiment 40 times.

The results were as follows:

 

 

a. Can Sasha conclude that there is a link between race of victim and readiness to intervene? Use a 5% level of significance and outline each of the steps required in a test of statistical significance.

b. Would your answer be any different if a 1% level of significance were used?

Transcribed Image Text:

Ancestry African Asian European Indian (Intervention within 5 mins; X = no intervention) 4 36 0 40 20 20 8 32 Ancestry African Asian European Indian (Intervention within 5 mins; X = no intervention) 4 36 0 40 20 20 8 32