Guidance counselors in a school would like to determine whether studying Latin helps students achieve higher scores on the verbal section of the SAT exam. In comparing records of 200 students, half of whom have taken at least 1 year of Latin, it is noted that the average SAT verbal score is higher for those 100 students who have taken Latin than for those who have not. Based on this result, guidance counselors began to recommend Latin for students who want to do well on the SAT exam. Match each line with correct choice.
1. observational study
4 The fact that students decided on their own to take Latin is a/an
2. treatment group
3. control group
1 This paragraph describes a/an
4. confounding factor
3 v The students who took Latin are the
5. placebo The students who did not take Latin are the
6. randomization
7. controlled experiment

Step-by-step explanation:

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.

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it