1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Katyanochek1 [597]
3 years ago
5

Randomization in an experiment is important because it ensures that

Mathematics
1 answer:
Alexeev081 [22]3 years ago
5 0

Answer:

C.) each treatment is thought of as a value of the explanatory variable

Step-by-step explanation:

The main purpose for using randomization in an experiment is to control the lurking variable and establish a cause and effect relationship.

If we do not control lurking, or confounding, variables, we cannot accurately establish a cause and effect relationship; this means we cannot ensure that each treatment is a value of the explanatory variable.

You might be interested in
The area of a semicircle is A=1/2(3.14)r^2 solve for r
Inessa05 [86]
First divide bot sides of the formula by 1/2(3.14):-

2A / 3.14 =  r^2

r = sqrt (2A/3.14)
7 0
3 years ago
Assuming that the population is normally​ distributed, construct a 9090​% confidence interval for the population mean for each o
jasenka [17]

Given:

Set A: 1 4 4 4 5 5 5 8

Mean: 4.5

Standard dev: 1.9

 

Set B:

Mean: 4.5

Standard dev: 2.45

 

% =  90 

Set A:

Standard Error, SE = s/ √n =    1.9/√8 = 0.67  

Degrees of freedom = n - 1 =   8 -1 =  7   

t- score =  1.89457861

<span> <span><span> <span>   </span> </span> </span></span>

Width of the confidence interval = t * SE =     1.89457861* 0.67 = 1.272685913

Lower Limit of the confidence interval = x-bar - width =      4.5 - 1.272685913 = 3.23

Upper Limit of the confidence interval = x-bar + width =      4.5 + 1.272685913 = 5.77

The 90% confidence interval is [3.23, 5.77]

 

Set B:

Standard Error, SE = s/ √n =    2.45/√8 = 0.87  

Degrees of freedom = n - 1 =   8 -1 = 7   

t- Score =  1.89457861

<span> <span><span> <span>   </span> </span> </span></span>

Width of the confidence interval = t * SE =     1.89457861* 0.87 = 1.641094994

Lower Limit of the confidence interval = x-bar - width =      4.5 - 1.641094994 = 2.86

Upper Limit of the confidence interval = x-bar + width =      4.5 + 1.641094994 = 6.14

The 90% confidence interval is [2.86, 6.14]

 

<span>We can obviously see that sample B has more variation in the scores than sample A. The fact that the standard deviation is 2.45 for B and 1.9 for A). Therefore, they yield dissimilar confidence intervals even though they have the same mean and range.</span>

6 0
3 years ago
Why are handcuffs like souvenirs?
ArbitrLikvidat [17]

<u>Part A)</u> 7(a+b)=7a+

Using the distributive property

7(a+b)=7a+7b

therefore

<u>the answer Part A is</u>

9-----> A

<u>Part R)</u>  4(5+x)=20+

Using the distributive property

4(5+x)=20+4x

therefore

<u>the answer Part R is</u>

14-----> R

<u>Part Y)</u> 3(2x+9)=6x+

Using the distributive property

3(2x+9)=6x+27

therefore

<u>the answer Part Y is</u>

4-----> Y

Part S)  8(3x+1)=+8

Using the distributive property

8(3x+1)=24x+8

therefore

<u>the answer Part S is</u>

23-----> S

<u>Part O)</u>  a(4+b)=+ab

Using the distributive property

a(4+b)=4a+ab

therefore

<u>the answer Part O is</u>

17-----> O  

<u>Part E)</u> x(y+10)=+10x

Using the distributive property

x(y+10)=xy+10x

therefore

<u>the answer Part E is</u>

3-----> E

<u>Part I)</u> 2(7x+4y)=14x+

Using the distributive property

2(7x+4y)=14x+8y

therefore

<u>the answer Part I is</u>

20-----> I

<u>Part D)</u> 6(9+5x)=54+

Using the distributive property

6(9+5x)=54+30x

therefore

<u>the answer Part D is</u>

10-----> D  

<u>Part W)</u> x(a+3b)=+3bx

Using the distributive property

x(a+3b)=ax+3bx

therefore

<u>the answer Part W is</u>

18-----> W

<u>Part E)</u> a(8x+2y)=8ax+

Using the distributive property

a(8x+2y)=8ax+2ay

therefore

<u>the answer Part E is</u>

7-----> E

<u>Part T)</u> 0.5(4a+10)=2a+

Using the distributive property

<u>Part T)</u> 0.5(4a+10)=2a+5

therefore

<u>the answer Part T is</u>

1-----> T

<u>Part R)</u> (2/3)(12+9y)=8+

Using the distributive property

(2/3)(12+9y)=8+6y

therefore

<u>the answer Part R is</u>

6-----> R  

<u>Part O)</u>  5x+5y=5(x+\ )

5x+5y=5(x+y)

therefore

<u>the answer Part O is</u>

13-----> O

<u>Part T)</u> 9a+9b=9(\ +b)

9a+9b=9(a+b)

therefore

<u>the answer Part T is</u>

22-----> T

Part W) 4m+4n=\ (m+n)

4m+4n=4(m+n)

therefore

<u>the answer Part W is</u>

16-----> W

<u>Part H)</u> ab+3a=a(b+\ )

ab+3a=a(b+3)

therefore

<u>the answer Part H is</u>

2-----> H  

<u>Part E)</u> xy+15x=\ (y+15)

xy+15x=x(y+15)

therefore

<u>the answer Part E is</u>

11-----> E

Part A) bu+uv=\ (b+v)

bu+uv=u(b+v)

therefore

<u>the answer Part A is</u>

5-----> A

<u>Part F)</u> (2/5)m+(2/5)n=(2/5)( \ +n)

(2/5)m+(2/5)n=(2/5)(m+n)

therefore

<u>the answer Part F is</u>

12-----> F

<u>Part M)</u> (3/4)a+(3/4)b+(3/4)c=\ (a+b+c)

(3/4)a+(3/4)b+(3/4)c=(3/4)(a+b+c)

therefore

<u>the answer Part M is</u>

8-----> M  

<u>Part S)</u> 7ax+2ay=a(7x+\ )

7ax+2ay=a(7x+2y)

therefore

<u>the answer Part S is</u>

21-----> S

Part T) 4kx+11ky=\ (4x+11y)

4kx+11ky=k(4x+11y)

therefore

<u>the answer Part T is</u>

15-----> T

<u>Part R)</u> 3ay+8by=y(\ +8b)          

3ay+8by=y(3a+8b)

therefore

<u>the answer Part R is</u>

19-----> R

<u>the answer is</u>

they are made for two wrists

4 0
3 years ago
Read 2 more answers
I NEED HELP ASAP I WILL GIVE ALL MY POINTS AWAY FOR THIS
podryga [215]

Step-by-step explanation: the tangent is 8/6 because it is the opposite (8) over the adjacent (6)

8 0
2 years ago
: John wants to move from point A to point B. To avoid the pond, he must walk 36 m south and 49 m east. However, he wants to go
just olya [345]

Answer:

60.80

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • A sandwich shop offers 4 different kinds of bread and 6 different kinds of meat. How many different sandwiches can be made using
    8·2 answers
  • Shelia does quality control for a company that manufactures lawn mower parts. On any given day, she finds the probability distri
    7·2 answers
  • What is the error made in the scatter plot for the data shown? (hats and scarves) thankyou~
    13·1 answer
  • What is -2(4g-3)=30 I can't figure it out so I need so help
    5·1 answer
  • Solve the problem 5/n = 1.5/ 1.8
    10·2 answers
  • If net income is $115,000 and interest expense is $30,000 for 2012 what is the rate earned on total assets for 2012 (round perce
    14·1 answer
  • Find m &lt; RQP
    7·1 answer
  • I need help with these questions plz help
    8·1 answer
  • 32
    5·1 answer
  • Answer asap pls no wrong answers
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!