I need to sketch this on a normal curve, but i am unsure what to point out, should i make one curve and put both means and sd's or two curves? My Z score is 1.96, what is my correlation? Shaded areas??
Please this is the last day it is due! I really need help!
Twenty students randomly assigned to an experimental group receive an
instructional program; 30 in a control group do not. After 6 months, both groups
are tested on their knowledge. The experimental group has a mean of 38 on the
test (with an estimated population standard deviation of 3); the control group
has a mean of 35 (with an estimated population standard deviation of 5).
Please this is the last day it is due! I really need help!
Twenty students randomly assigned to an experimental group receive an
instructional program; 30 in a control group do not. After 6 months, both groups
are tested on their knowledge. The experimental group has a mean of 38 on the
test (with an estimated population standard deviation of 3); the control group
has a mean of 35 (with an estimated population standard deviation of 5).