Use the following information to answer the following four questions A health psychologist is interested in the potential effect that a change in career focus can have on cardiovascular disease for those in high stress jobs She chooses to study divorce lawyers a population that averages a mean systolic blood pressure of 142 with a standard deviation of 13 and measures the blood pressure of 23 former divorce lawyers who switched to environmental law Those 23 lawyers have a mean systolic blood pressure of 131 If all divorce lawyers switched to environmental law what would you expect the mean systolic blood pressure to be with 99 confidence