Regression analyses on two different bivariate data sets (A & B) may reveal that they have identical slopes but different correlations.

If the sample mean is 45, the upper limit for the 95% confidence interval is __________

Fill in the blanks with correct word

Mirena wants is interested in the effects of gender on aggression. She collects all the studies she can find that have been conducted on this topic, and averages their results to generate a big picture of what the findings in that area reveal. Mirena has conducted a ____

a. correlational study b. field experiment c. quasi-experiment d. meta-analysis