A theater reported that their highest beverage sales this year occurred during showings of The Great African Desert. However, we cannot conclude that the film affected beverage consumption because
a. the placebo effect was not considered.
b. only a correlation can establish causation.
c. no correlation was computed.
d. there was no control group.
d
You might also like to view...
Two nominal variables are to _____ coefficient as two ordinal variables are to _____ coefficient
a. Pearson product-moment correlation; Spearman rank-order correlation b. Spearman rank-order correlation; Pearson product-moment correlation c. phi; Spearman rank-order correlation d. point-biserial correlation; Spearman rank-order correlation
Two interval/ratio variables are to _____ coefficient as one interval/ratio variable and one nominal variable are to _____ coefficient
a. Pearson product-moment correlation; Spearman rank-order correlation b. Spearman rank-order correlation; Pearson product-moment correlation c. phi; Spearman rank-order correlation d. Pearson product-moment correlation; point-biserial correlation