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taurus [48]
3 years ago
14

Identify which of these designs is most appropriate for the given​ experiment: completely randomized​ design, randomized block​

design, or matched pairs design. A drug is designed to treat insomnia. In a clinical trial of the​ drug, amounts of sleep each night are measured before and after subjects have been treated with the drug.
Mathematics
1 answer:
Stels [109]3 years ago
4 0

Answer:

Matched pairs design

Step-by-step explanation:

A matched pair design can be used in a case where the same people are being measured in before-and-after comparison. The same set of people are measured for the amount of sleep each night before the administration of the drugs and after the drug administration and this is used to test for a difference.

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Triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C'.
frozen [14]

Note: Consider we need to find the vertices of the triangle A'B'C'

Given:

Triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C'.

Triangle A,B,C with vertices at A(-3, 6), B(2, 9), and C(1, 1).

To find:

The vertices of the triangle A'B'C'.

Solution:

If triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C', then

(x,y)\to (y,-x)

Using this rule, we get

A(-3,6)\to A'(6,3)

B(2,9)\to B'(9,-2)

C(1,1)\to C'(1,-1)

Therefore, the vertices of A'B'C' are A'(6,3), B'(9,-2) and C'(1,-1).

7 0
4 years ago
Beginning with the equation 2x + 8y = 12, write an additional equation that would create:
kramer

Answer:

[see below]

Step-by-step explanation:

A system of equations with no solution would show parallel  lines. We just have make a equation that is parallel to the original equation.

The slope of 2x + 8y = 12 is -\frac{1}{4}, and it's y-intercept is \frac{3}{2}.

Since parallel lines have the same slope but not the same y-intercept, I would use y=-\frac{1}{4}x+3.

Any equation that has -1/4 as the slope would work.  

When graphed together, they show as a system with no solution.

Hope this helps.

3 0
3 years ago
A natural number _a rational number.
lora16 [44]
A natural number is a positive integer, example, 1,2,5,299 etc.
A rational number is a number that can be expressed as a fraction of integers, such as 245/127, 1/2, 5/1,8/1,...
Since a natural number can be expressed as a fraction of integers, so 

a natural number IS a rational number.
5 0
3 years ago
What is 9/21 in simplest form
mote1985 [20]
The answer is 3/7

9÷3=3
21÷3=7
4 0
3 years ago
Read 2 more answers
The first Chief Justice of the U.S. Supreme Court, John Jay, served 2079 days as Chief Justice. He served 10,463 days fewer than
Elden [556K]

Here's a listing of ALL 113 Supreme Court Justices.

1728.com/supcourt.htm

And here is a great date to date calculator

https://www.timeanddate.com/date/durationresult.html?m1=10&d1=06&y1=1951&m2=09&d2=10&y2=2018

8 0
3 years ago
Read 2 more answers
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