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
inessss [21]
2 years ago
5

Explain why the sign of the slope of a regression line must be thesame as the sign of the correlation coeffi cient.

Chemistry
2 answers:
Umnica [9.8K]2 years ago
8 0

Answer:

The calculation of a standard deviation involves taking the positive square root of a nonnegative number. As a result, both standard deviations in the formula for the slope must be nonnegative. ... Therefore the sign of the correlation coefficient will be the same as the sign of the slope of the regression line.

Explanation:

have a nice day

MAXImum [283]2 years ago
6 0

Answer:

The calculation of a standard deviation involves taking the positive square root of a nonnegative number. As a result, both standard deviations in the formula for the slope must be nonnegative. ... Therefore the sign of the correlation coefficient will be the same as the sign of the slope of the regression line.

Explanation:

You might be interested in
The surface of what he can act like a sort of skin due to a Liquid called
PIT_PIT [208]
 A Liquid called Surface Tension. 
8 0
3 years ago
What is the correct prefix for 3 <br> tri-<br> di-<br> mono-<br> tetra-
Ivenika [448]

Answer:

tri-

Explanation:

Examples could be Tri-angle, Tri-cycle, Tri-ceratops

5 0
3 years ago
Read 2 more answers
A 0.0000792 M sample of Compound X in a solvent has an absorbance of 0.341 at 528 nm in a 1.000-cm cuvet. The solvent alone has
natima [27]

Answer:

a) a = 3485 M⁻¹cm⁻¹

b) C = 0,000127 M

Explanation:

Lambert-Beer law says that there is a linear relationship between absorbance and concentration of a chemical substance. The formula is:

A = a×b×C

Where A is absorbance, a is molar absorptivity, b is path length and C is concentration.

a) In the problem Concentration is 0.0000792 M, b is 1,000cm and Absorbance is absorbance of sample-absorbance of blank: 0,341-0,065 = 0,276

Replacing:

0,276 = a×1,000cm×0,0000792M

<em>a = 3485 M⁻¹cm⁻¹</em>

b) As the experiment consist in the same compound in the same solvent, the molar absorptivity will be the same, a = 3485 M⁻¹cm⁻¹, path length will be 1,000cm and absorbance: 0,508-0,065 = 0,443

Replacing:

0,443 = 3485 M⁻¹cm⁻¹×1,000cm×C

<em>C = 0,000127 M </em>

<em></em>

I hope it helps!

8 0
3 years ago
What mass of hydrogen is produced when 49.0 grams of sodium reacts with 30.0 grams of water
nekit [7.7K]

Answer:

the mass of the products must equal the mass of reactants. which means the total mass is 10 grams.

Explanation:

4 0
3 years ago
Angle of incidence and refraction for air at 0 degrees?
iVinArrow [24]

Answer:

zero

Explanation:

When the air is zero degrees then it implies that the air is travelling at an perpendicular to the normal direction.  

Therefore, the angle of incidence would be zero degree and in relation to that the angle of reflection and refraction would also be zero degree as per the laws of reflection.  

In other ways it can be said that the light goes un-deviated.  

4 0
3 years ago
Other questions:
  • a chemist is studying an unknown substance he can break it into its elemental only by using chemical means.Based on this observa
    7·1 answer
  • What is an example of how enginers contrbiuted to society
    13·1 answer
  • What is 2,100 in Scientific notation
    14·2 answers
  • Consider the reaction below. At 500 K, the reaction is at equilibrium with the following concentrations. [PCI5]= 0.0095 M [PCI3]
    13·2 answers
  • What one is correct?
    6·1 answer
  • Explain why the lattice energy and the energy of crystallization of a substance differ in sign but are equal in magnitude.
    6·1 answer
  • What other elements does iron commonly bonds with.
    10·1 answer
  • Name the 3 subatomic particles with their respective charges
    15·1 answer
  • If more powdered Kool-Aid is added to the same amount of water, what happens to the solution (the answer I clicked I don’t know
    6·1 answer
  • Which of the following are polyatomic ions? Check all that apply
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!