Refer to the previous exercise about the effect of oxytocin on the ability to infer the mental state of others, as measured by the RMET score. Recall that for the sample of 30 participants, the researchers noted that the average increase in RMET score when on oxytocin compared to when on the placebo was 3 points, with a standard deviation of 7.54 points.

a. Use the formula of the standardized statistic

to calculate its value. Interpret the value of the standardized statistic in the context of the study.
b. Use the formula for the confidence interval

Transcribed Image Text:

X4 – 0) Sal Vn, Sa тultiplier X Vп, +1