Respond to this Question
Similar Questions

biostatistic
there are 200 subjects enrolled to receive either experimental medications or placebo. At the end of study following data is collected after 6 week. (sd)= standard deviation. BP= blood pressure. experimental meds placebo (n=100) 
statistics
A professional basketball player has embarked on a program to study his ability to shoot foul shots. On each day in which a game is not scheduled, he intends to shoot 100 foul shots. He maintains records over a period of 40 days 
Calculus
The cost of producing x units of a certain commodity is C(x)=1000+5.70x+0.7x^2 . What is the average rate of change of C with respect to x when the production level is raised from x = 100 to x = 120 and when the production level 
Psychology
A psychologist is performing an experiment involving a controlled group and an experimental group. With the experimental group, the psychologist is giving a placebo and labeling it as caffeine pill. The control group receives a 
Can someone help with this?
A psychologist is performing an experiment involving a controlled group and an experimental group. With the experimental group, the psychologist is giving a placebo and labeling it as caffeine pill. The control group receives a 
Stats
Y is a discrete random variable. The table below reports the values of Y and the corresponding frequency, n (the number of observations for each value). Based on this information, what is the expected value of Y? Y n 50 50 70 100 
drwls:precalc
4x^29y^240x+36y+100=0 I still end up with the wrong answer. I end up with 4(x5)^2/120  9(y+2)^2=120 9 can't go into 120 My procedure: (4x^240x)(9y^2+36y)=100 4(x^210x +4)9(y^2 +4 +4)=100+ 4(4)9(4) 
math help, correction
Anna has 12 bills in her wallet, some $5 and some $10. The total value of the bills is $100. HOw many of each bill odes Anna have? How do i solve these type of problems my quess was this but i don't know if i'm correct. 5(x) + 
biology
What is the difference between a control group and an experimental group? Thanks in advance. :) control group is the group you do not change (what you comapre the experiement to), the experimental group is the group that you do 
Science
What is the independent variable for: Does a color have an effect a person's food choice? color is the independent variable, food choices are the dependent variable. The difficult part here is what will be the control variable. In