A Study Found That 50 Pedestrians Gave More Money to a Street

A study found that 50 pedestrians gave more money to a street beggar if the beggar had a cute and hungry-looking dog with them compared to if they were alone. The gender of the pedestrians was also noted. Which of the following sentences describes a simple effects analysis on these data?

A) The difference in donations when the beggar had a dog compared to not
B) The effect of having a dog compared to not on donations calculated separately for male and female pedestrians
C) The relative difference between male donations and female donations when the beggar had a dog compared to not
D) Using a graph to do a simple inspection of the mean donations from male and female pedestrians when the beggar had a dog or was alone

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