A hypothesis is an organized system of assumptions and principles that purports to explain a specified set of phenomena

Because of the assumption that the population variances are equal, when conducting an analysis of variance

A) fewer degrees of freedom are required. B) sample variances are not important. C) an average estimate of the population variance is computed. D) population parameters are used instead of sample statistics.

With regard to facial emotional expression,

a. the sides of the face are equivalent during emotional expression. b. positive emotions are more strongly displayed on the right side of the face. c. negative emotions are more strongly displayed on the right side of the face. d. positive emotions are more strongly expressed than are negative emotions. e. negative emotional expressions are more intensely expressed on the left side of the face.