Answer:
Explanation:
Solving (a): P(Joe)
To get this probability, we simply add up the items in the column named Joe.
These items are:
Joe: 34 and 70
And the total is:
The overall population of the system is:
So:
Solving (a): P(Joe and North Side)
To get this probability, we simply get the intersecting element of Joe column and North Side row.
From the table, the intersecting element is:
Joe and North Side: 70
The overall population of the system is:
The option that best describes how the teacher likely came to this conclusion is that:
- The teacher conducted an observational study by comparing the performance on the test of those who completed their review worksheets to those who did not complete their review worksheets.
<h3>What is observational study?</h3>
An observational study is known to be a kind of study where a researcher do observes the subjects without having any form of interference with them.
Here, the researcher is said to have no control over any of the treatments that is used on the subjects. All the have to do is observe and record their findings.
See options below
A. The teacher conducted an observational study by comparing the performance on the test of those who completed their review worksheets to those who did not complete their review worksheets.
B. The teacher conducted a sample survey by asking students if they completed their review worksheets and if they think they did well on the test.
C. The teacher performed a controlled experiment in which one group of students decided not to complete their review worksheets and the other group decided to complete their review worksheets.
D. The teacher performed a random experiment in which the test scores of one group of students would be higher and the test scores of the other group would be lower.
Learn more about worksheets from
brainly.com/question/23624194
2 will agree and 2 will disagree so the answer is 4
Because heat increases energy of the particles, making them move faster, thus making them collide faster...which makes it mix quicker and more efficiently