A psychologist is interested in the effect of social pressure. She selects a gro

A psychologist is interested in the effect of social pressure. She selects a group of 10 male subjects at random from her introductory psychology course. Each subject is asked to estimate by eye the length of a stick under two conditions. In one condition, the subject is placed in the presence of four other persons who, unknown to him, have been instructed to give estimates that are too large. Each of these persons gives his estimate orally to the experimenter before the subject is asked for his estimate. In the other condition, the same procedure is employed, except that the other four persons present are told to give honest estimates. For each subject, the order of the two conditions is determined randomly. Estimates (in inches) made by each subject under both conditions are given in Data 15C. (a) State formally the null and alternative hypotheses necessary to conduct a non directional test. (b) Complete the test using .05, and state your conclusion. (c) Calculate effect size, g.

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