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2 years ago

8

Researcher Sandy Beach found a correlation coefficient of +2.3 between variables X and Y. She is thrilled because that correlati

on is "like, way high." She also feels that this answer "proves that X is 'like, causing Y.'" What are three problems with Sandyâs conclusions?

1 answer:

tia_tia [17]2 years ago

7 0

Correlation coefficient is always between -1 and +1. So it cannot be +2.3

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Laura has 30 cupcakes she wants to give each friend 1/6 of her cupcakes how many cupcakes will Each friend get

sdas [7]

Answer:

5 cupcakes

Step-by-step explanation:

=1x 30/ 6

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3 years ago

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Please I BEG YOU! Find the ordered pair (x,y) if x+y=(5-x)+(5-y), x-y=(x-1)+(y-1).

qwelly [4]

Answer:

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Step-by-step explanation:

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2 years ago

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Can you please help me?

irina [24]

So for this you just want to divide 4/5 by 9/10 because it is the opposite of the equation.

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3 years ago

A box contains balls numbered 3 through 15.

Phantasy [73]

Answer: 6/13

Step-by-step explanation:

A box contains balls numbered 3 through 15. This means that the sample space = {3 , 4 ,5 , 6 ,7, 8, 9, 10, 11, 12, 13, 14, 15,}

The total number of sample space = 13

Therefore : the probability of picking 3, 5, 9, 11, 12, 15 , will be the total number of times they appear in the sample space divided by the number of sample space.

number of times 3 appears = 1

number of times 5 appear = 1

number of times 9 appear = 1

number of times 11 appear = 1

number of times 12 appear = 1

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Therefore : the probability of picking one of the numbers = 6/13

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2 years ago

A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. As the wave move

vlabodo [156]

Answer:

a) Frequency remains constant

b) Wavelength remains constant

c) speed of the wave remains constant

d) Intensity decreases

e) amplitude of its electric field decreases

Explanation:

a) Frequency can be defined as the number of crests that pass a fixed point in the medium in unit time. It is the source of the wave that will determine the frequency. If the small source is changed to a bigger and faster one then the frequency will change. In our case, there is no change of source of wave, so the frequency remains constant.

b) The speed of of the wave is directly proportional to the wavelength. If we double the speed, the wavelength also doubles. Since the speed has not been doubled in our case, the wavelength will remain constant.

c) As indicated in b) since the wavelength is proportional to speed and it has not changed in our case, then the speed remains constant.

d) The intensity of a wave decreases as it moves further away from the source.

e) The intensity is related to the amplitude. Since the intensity decreases, the amplitude also decreases.

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3 years ago