To find the mean of a group of data, you add up all of the numbers and divide the total by the amount of numbers there are. In this case, you have 15,11,10,11,14,10,15,10,and 12.
1. This paragraph describes an observational study.
It is not a controlled experiment because the guidance counselors didn't plan to separate the students into 2 groups and then observe the results. They instead checked records.
2. The students who took Latin are the treatment group.
3. The fact that students decided on their own to take Latin is a confounding factor.
4. The students who did not take Latin are the placebo or control group.
To find a missing side of a right triangle use the Pythagorean theorem A2+b2=c2 C is the hypotenuse (long side) Plug into the equation 11^2+b2=12^2 121+b2=144 So subtract 144-121 to get the missing side you get 23 Take the square root It will be 4.7 If they want it rounded X=5 If I had any mistakes in my answer I am sorry but everything should be correct
