Which of the following principles of experimental design reduces errors due
to chance by repeating an experiment on different subjects under different
conditions?
A. Placebo effect
B. Replication
C. Randomization
D. Control
E. Blindness

Answers

Answer 1

Answer:

Replication

Step-by-step explanation:

Replication meaning it's going to be repeated, also it said replication was right on a-pex


Related Questions

Write the phrase as a unit rate.
$13.50 for 3.6 lb
Alb
Please help FAST

Answers

Answer:

$3.75/lb

Step-by-step explanation:

First, let's set up a proportion. The top number represents the cost, while the bottom number represents how many pounds. In order to get a unit rate, we need to figure out how much it costs for 1 pound.

[tex]\frac{13.5}{3.6} =\frac{x}{1}[/tex]

Now, cross multiply. To cross multiply, you would multiply 13.5 by 1 and 3.6 by x.

[tex]13.5 * 1 =13.5\\3.6*x=3.6x[/tex]

Set these two equal to each other.

[tex]13.5=3.6x[/tex]

Divide both sides by 3.6 to get x.

[tex]\frac{13.5}{3.6} =\frac{3.6x}{3.6}\\x=3.75[/tex]

For unit rates, you have to write your answer as per unit. To do that, put a slash next to your answer, and then your unit.

$3.75 / lb (unit)

Two interior angles of a triangle each measure 34°. What is the measure of the third interior angle?
A. 146°
B. 292°
C. 56°
D. 112°

Answers

Answer:

D. 112

Step-by-step explanation:

Since we know that a triangle totals 180 degrees, we can easily figure out the third angle. Since each measure 34 degrees, simply multiply by 2. You get 68 degrees. Then you do 180-68 to get 112.

PLEASE HELP!!!! attached photo

Answers

Answer:

(-1, -2.5)

Step-by-step explanation:

The midpoint formula is just basicallyadding both  of the x values and then dividing the sum of them by 2, after that you will be adding both y values and then dividing them by 2, then you will get the midpoint x and y coordinate values. You can look up midpoint formula on google to see how it's actually written. You have to make sure to add correctly when you are using the negative numbers, because they can actually turn the equations into subtraction. Keep in mind, it can beconfusing sometimes when you are working with positive and negative numbers together. So make sure to just double check your work and also to make sure you added correctly.

Brainliest please, I need a few more :D

What is the reciprocal of 3/4?
2
4/3
3/4
1/4 lb
none of the above

Answers

The reciprocal of 3/4 is 4/3.

Hope it will be helpful to u

The answer is 4/3. The reciprocal is just that opposite which is flipped around.

I need help ples.
What is the volume of composite solid?

Answers

Answer:

58 13/32 ft. cubed

Step-by-step explanation:

Horizontal Shape: 6 x 5/2 x 7/4 = 26 1/4 ft.

Vertical Shape: 7/2 x 21/4 x 7/4 = 32 5/32 ft.

Total Volume: 26 1/4 + 32 5/32 = 58 13/32 ft. cubed

If this helped can I get brainliest :)

Find the median of the data.

8,8,6,8,4,5,6

Answers

Answer: The median is 6

Step-by-step explanation:

4 5 6 6 8 8 8

4 5 6 6 8 8 8

What is the distance between the points (22, 27) and
(2,-10)? If necessary, round your answer to two decimal
places.

Answers

Answer:

d = 42.06

Step-by-step explanation:

d=(2−22)2+(−10−27)2−−−−−−−−−−−−−−−−−−−√

d=(−20)2+(−37)2−−−−−−−−−−−−−√

d=400+1369−−−−−−−−−√

d=1–√769

d=42.059482

hello!? what's 3 + 3

Answers

Answer:

6

Step-by-step explanation

Answer:

6

Step-by-step explanation:

if you have 3 apples and 3 banannas in all you have 6 fruits in total :)

3 bugs+ 3 ladybugs= 6 bugs

Hope this helps lol :)

math question screen shot below

Answers

Answer:

a.3 m/s

Step-by-step explanation:

90 divided by 30

plz give brainliesttt

WILL MARK BRAINLIEST! If you buy 3 pounds of hamburg for $8.97, how much will it cost for 5 pounds of hamburg?

Answers

Answer:

14.95

Step-by-step explanation:

every 1 pound is 2.99 so you would do 2.99 * 5

Answer:

$14.95

Step-by-step explanation:

To find the slope or the cost per pound of hamburger you divide 8.97 by 5 in order to find out it costs 2.99 per hamburger. You then, multiply 2.99 by 5 to gather that to buy 5 pounds of hamburger it would cost $14.95.

A 10-foot ladder is to be placed Against the side of the building. The base of the latter must be placed in an angle of 72° With the level ground for a secure footing. Find, to the nearest inch, how far the base of the latter should be from the side of the building and how far up the side of the building the latter will reach.

Answers

Answer:

Distance of foot of ladder from building: 37.2 inches

Distance of top of ladder from building's base: 114 inches

Step-by-step explanation:

Please refer to the figure attached in the answer area.

A right angled triangle [tex]\triangle ABC[/tex] is formed by the ladder with the building where hypotenuse is the length of ladder.

Hypotenuse, AC = 10 foot

Also, we are given that angle made by the base of ladder with the ground is [tex]72^\circ[/tex].

We have to find AB and BC.

[tex]\angle BAC = 72^\circ[/tex]

Using trigonometric functions:

[tex]cos \theta= \dfrac{Base}{Hypotenuse}\\cos 72^\circ= \dfrac{AB}{AC}\\\Rightarrow 0.309 = \dfrac{AB}{AC}\\\Rightarrow AB = 10 \times 0.309\\$\approx$ 3.1 foot\\$\approx$ 37.2 inches[/tex]

[tex]sin \theta = \dfrac{Perpendicular}{Hypotenuse}\\\Rightarrow sin72^\circ = \dfrac{BC}{AC}\\\Rightarrow 0.95 = \dfrac{BC}{AC}\\\Rightarrow AB = 10 \times 0.95\\$\approx$ 9.5 foot\\$\approx$ 114 inches[/tex]

Distance of foot of ladder from building: 37.2 inches

Distance of top of ladder from building's base: 114 inches

Point L was plotted at (-4, 1), then L was transformed creating point L’ at (-1, -4).Which transformation rule could have been used to plot L’?
Reflection across the x-axis
a 180 degree rotation about the origin
A 270 degree rotation counterclockwise rotations about the origin
A translation using the rule (x,y) -->(x+3, y -5)

Answers

Answer:

you would go down 2 from the point

Step-by-step explanation:

What is the domain of the following parabola? (5 points)
3
-2
-1/
x
1
xs1
All real numbers
ys2

Answers

Answer:

Step-by-step explanation:

The domain of this quadratic is "all real numbers."  The function is defined for all x.  

Use the ratio test to determine whether the series is convergent or divergent.2 +4/2^2 + 8/3^2 + 16/4^2 +

Answers

Answer:

The result is 2 > 1. Hence, the series diverges

Step-by-step explanation:

You have the following series:

[tex]2+\frac{4}{2^2}+\frac{8}{3^2}+\frac{16}{4^2}+...+\frac{2^n}{n^2}=\sum_{i=1}^{i=n}a_n[/tex]   (1)

You use the ratio test to determine if the series is convergent or divergent. The ratios test is given by:

[tex]\lim_{n \to \infty} \frac{a_{n+1}}{a_n}[/tex] (2)

Then, you replace the series (1) in (2):

[tex]\lim_{n \to \infty} \frac{\frac{2^{n+1}}{(n+1)^2}}{\frac{2^n}{n^2}}= \lim_{n \to \infty} \frac{(2^n2)(n^2)}{2^n(n+1)^2}\\\\\lim_{n \to \infty} \frac{2n^2}{n^2+2n+1}= \lim_{n \to \infty} \frac{2n^2}{n^2[1+\frac{2}{n}+\frac{1}{n^2}]} \\\\\lim_{n \to \infty} \frac{2}{1+\frac{2}{n}+\frac{1}{n^2}}=\frac{2}{1+0+0}=2[/tex]

In the ratio test you have that if the limit is greater than 1, the series diverges.

The result is 2 > 1. Hence, the series diverges.

The sale price of a drum kit in the UK is 950 Pounds + VAT (Value Added Tax), where VAT is a sales tax of 20%. After some negotiation, the owner of the store agrees to give Bob a 12% discount on the drum kit. What is the total price that Bob pays, including VAT? Answer in Pounds and round your answer to the nearest pence (1 pence=1100Pound).


Note: VAT is a sales tax that gets calculated before a discount is applied.

Answers

Answer:

Step-by-step explanation:

Sale price = 950 pounds + vat

Vat = 20%

Value vat = 20/10 × 950 = 190 pounds.

Since the vat is calculated before a discount is applied, it means that the amount on which the discount was applied is

950 pounds

The value of the discount would be

12/100 × 950 = 114 pounds

The amount to be paid including vat is

(950 - 114) + 190 = 1026 pounds

What is the area of this triangle?

A. 12 square centimeters

B. 36 square centimeters

C. 16 square centimeters

D. 18 square centimeters

Answers

Answer:

A is the correct answer.

Step-by-step explanation:

The formula for the area of a triangle is A = 1/2 b x h

The base in this triangle is 6 and the height is 4 so 6 x 4 = 24.

Now we divide 24 by 2 which gives us 12 square centimeters.  

Hope this helps

Answer: A. 12 square centimeters

Step-by-step explanation:

The area of a triangle is (1/2)bh because any triangle is half of a square (square formula = bh).

1/2bh --> 1/2  * 6 * 4 --> 12 square centimeters

Hope this helps! Good Luck :)

What is the sum of these expressions: (-3.5t - 4s + 4.5) + (-7.1 - 0.3s + 4.1t)

Answers

Answer:

0.6t - 4.3s - 2.6.

Step-by-step explanation:

PEMDAS

Answer:

-4.3s+0.6t-2.6

Step-by-step explanation:

Add like terms:

-3.5t+4.1t-4s-0.3s+4.5-7.1

= 0.6t-4.3s-2.6

= -4.3s+0.6t-2.6

Data was collected for the number of births per 10,000 people in the United States of America for 20 consecutive years. Below is the data for those 20 consecutive years. Construct a p chart and answer the question below.

157 160 164 167 167 162 158 154 150 146 144 142 143 142 144 141 139 141 140 140
Select the correct lower control limit.

Answers

Answer:

Option A is correct.

Step-by-step explanation:

Unit 6: Statistical Process Control POSTTEST Answers (STANDARD NOT HONORS STATISTICS)

1. p bar = 0.0061

2. x bar = 6.992

3. UCL = 0.019

4. Process mean is not within statistical control. There are points above and below the control limits. There is an upward trend.

5. UCL = 58.90; LCL = 40.24

6. Process appears to be out of statistical control. There is a point that lies above the upper control limit.

7. Process mean is not within statistical control. One of the points lies above the upper control limit.

8. UCL = 0.133

9. Process is out of statistical control. There is a downward trend.

10. Process mean is not within statistical control. There are points above and below the control limits. There is a cyclical pattern.

PEARSON CONNEXUS STUDENTS: 100% correct if you put these answers.

What is the area C in terms of

Answers

Answer: D

Hope this help

PLEASE HELP ME, I WILL GIVE U BRAINLIEST,

Answers

Answer:

around 9.8

Step-by-step explanation:

This is a right triangle, so to find x, you can use pythagorem theorem:

So...

23^2+x^2=25^2

529+x^2=625

x^2=96

x is around 9.8

Answer:

9.79 or 9.9

Step-by-step explanation:

Its around 9, estimation...

A survey will ask people if they want
more stop signs near a school. Which
group would be probably be biased
against this idea?
A students
B teachers
C driver

Answers

driver because it slows them down

Answer:

I believe the answer is C. Driver.

Step-by-step explanation:

The driver is the person who has to pass by the school everyday. This means they would have to take out extra time because of the stop signs, so they would be against this.

Please help me will give brainliest

Answers

Answer:

Mean = [26 + 31 + 39 + 32]/4 = 32

MAD = (1/4) x [|26 - 32| + |31 - 32| + |32 - 32| + |39 - 32|] = (1/4) x 14 = 3.5

Hope this helps!

:)

Answer:

3.5 putts

Step-by-step explanation:

Mean: 26 + 31 + 32 + 39 = 128/4 = 32

32 - 26 = 6

32 - 31 = 1

32 - 32 = 0

32 - 39 = 7

Mean Absolute Deviation (MAD): 6 + 1 + 0 + 7 = 14/4 = 3.5

~ hope this helps you, have a good day ~

40 - 80 -
60
40 - 80 + 80
60 + ?
4c =
40
20
?

Answers

Answer:

The answer is ZERO ( 0 )

Answer:

The accurate answer is 0 (zεʀο)

Find the surface area of the figure. Round to the nearest hundredth.

Answers

SA of half of this cylinder:

1/2*2pi(3)^2+1/2*2pi*3*25

9pi+75pi

84pi cm^2 OR 263.89 cm^2

acute scalene Triangle

right scalene triangle

acute isoceles triangle

right equilateral triangle

Answers

Answer:  I hope this helps

Right scalene triangle

Step-by-step explanation:

The triangle that I made with 4cm, 7cm, and 8 cm. had a right angle and also has all unequal sides which is basically the exact definition of a right scalene triangle.

Please mark brainliest if you are satisfied with this answer  :)

5(7 + 3x) - 12 how to simplify​

Answers

To solve this we need to use this formula:

a(b+c)=ab+ac

5(7+3x)-12=35+15x-12=15x+23

Answer:

Step-by-step explanation:

Multiply the 5 to the 7 and 3x--> 35 + 15x -12. Then add 12 to the -12, making it 0 (inverse operations), and add 12 to the 35 making it 47 + 15x. :) Then you would simply divide the 15 by 15x (making the variable by itself). your answer for x should be 47/15. :> If I helped, please mark brainliest!!

Find the area of a face of a rectangular prism.

What is the area of the front of the prism?

Area =
cm2

Answers

Answer:

It is L*W*H.

Width times Height

Step-by-step explanation:

I don't know what you are exactly talking about, there are no attached worksheet. But if you are talking about the formula for the rectangular prism.

Formula for rectangle prism: L*W*H

Area of the front of the prism: Width times height

Answer:

12cm2

Step-by-step explanation:

edge 2020 correct on assignment

Jen can bike 12 miles in 40 minutes. How much time will she need to bike 30 miles if her speed remains the same? PLEASE HELP QUICK

Answers

Answer: 100 minutes

Step-by-step explanation:

With the given information, we can use a proportion to figure out how long it would take for Jen to bike 30 miles.

[tex]\frac{12mi}{40min} =\frac{30mi}{x} \\[/tex]

[tex]12x=30*40[/tex]

[tex]12x=1200[/tex]

[tex]x=100[/tex]

Answer:
100

40 divided by 12 and then multiply it by 30.

A sandwich store charges $20 to have 3 turkey subs delivered and $26 to have 4 delivered. How much does the store charge for 1 additional turkey sub? Describe a rule of determining how much the store charges based on the number of turkey subs delivered

Answers

Answer:

32

Step-by-step explanation:

26+6 =32

Find the distance between the points (3,−5) and , (−7,−5).

Answers

Answer:

the awnser is 10

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