A football coach gives half his players a protein bar to eat before each game; the other players do not receive the protein bar. After a month of games, he analyzes their playing stats. He concludes the protein bar helped improve their performance on the field. How can the coach test the means to be sure the results are not likely to happen by chance?A.He can rerandomize the results by separating the two groups randomly, then calculate the means and the difference of the means.
B.He can pick players at random and analyze their playing stats without calculating means.
C.He can analyze the two groups by calculating the means and the difference of the means.
D.He can pick the players he wants to analyze based on the best stats.

Answers

Answer 1

Answer:

Answer:

The answer is option A.

Step-by-step explanation:

How can the coach test the means to be sure the results are not likely to happen by chance?

A.He can re randomize the results by separating the two groups randomly, then calculate the means and the difference of the means. (This is because, in statistical data, it cannot happen by chance. It has to be a valid occurrence, nothing by chance.)

Answer 2

Answer:

Answer:

A.He can rerandomize the results by separating the two groups randomly, then calculate the means and the difference of the means.

Step-by-step explanation:

He can randomize again the players that are receiving the bar and those who are not, and then after that he can see if the results from the previous experiment were accurate or if they happened just by chance. In this way he can make sure that if the results with this two new groups after randomizing are the same that the bar is actually improving the players an edge on performance.

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What volume in ml of 0.500 M silver nitrate is required to completely react with 25.0 ml of 1.5 M calcium chloride?

Answers

First, the balanced chemical equation of the reaction must be written. This gives:

2 AgNO3 (aq) + CaCl2 (aq) --> 2 AgCl (s) + Ca(NO3)2 (aq)

This shows that for every mole of CaCl2, 2 moles of AgNO3 reacts (1:2 ratio). Given the volume and molarity of CaCl2, we can compute for the number of moles of CaCl2.

moles CaCl2 = 1.5M(25mL/1000) = 0.0375 moles

Now, we can also compute for the moles of AgNO3 using the balanced equation.

moles AgNO3 = 2(0.0375) = 0.075 moles

Using the moles and molarity of AgNO3, we can compute for the volume needed.

volume (mL)/1000 = 0.075/0.5 = 150 mL of silver nitrate solution is required.

HEKP PLEASE; what is movement competence ?1 when we move in safe manner
2 when we move with confidence
3 when our movement is effective
4 all the above

Answers

Answer:

I think its maybe 2 you might want to check tho

George bought a Christmas tree to put in his living room.He paid$50 for his tree. After he took it home, he realized it was too tall and sold it to his neighbor for $60.his neighbor put the lights on the tree and then decided the tree was to wide. George looked at the tree again and offered to buy the tree back for $70. He was no longer pleased with the tree so he sold it for$80. What was George 's financial outcome on hie venture?

Answers

George's financial outcome includes a profit of $20.

We have a buy and sell situation between George and his Neighbor as mentioned in the question.

We have to find out about George 's financial outcome after the complete process.

What is the formula to calculate the profit and loss of an object?

The formula to calculate -

Profit = Cost price - Selling price

Loss = Selling price - cost price

According to the question, we have -

Case - 1 :

Cost of tree bought by George = $50

Amount at which he sold it to his neighbor = $60

Case - 2 :

New Cost George offered to buy the tree back = $70

New cost at which the George sold it again = $80

Now -

Profit in Case 1 for George = $60 - $50 = $10

Profit in Case 2 for George = $80 - $70 = $10

Now -

initial cost of tree = $60

final cost at which George sold it = $80

Profit = $80 - $ 60

Profit = $ 20

Hence, George's financial outcome includes a profit of $20.

To solve more questions on Profit an loss, visit the link below -

brainly.com/question/12047224

#SPJ2

George's financial outcome was $70. He bought it for $50, and then he sold it for $60 in return. He bought it for $70 again, so subtract 60-70= -10. He then sold it for $80 which he gained so -10 + 80 = $70.

Solve the inequality 3m greater than or equal to 9

Answers

Hello,

$3m \geq 9\,\,(Divided\,\,for\,\,3)\n \n (3m)/(3) \geq (9)/(3)\n \n \boxed{m \geq 3}\,\, \,\,or\,\,\,\,\boxed{m \in\to[3, +\infty)}$

Sqrt(2−7x) -sqrt(x 3) =3

Answers

$(a+b)^2=a^2+2ab+b^2 \n \n √(2-7x) - √(x+3) =3 \n (√(2-7x))^2 =(3 + √(x+3))^2\n2-7x=9+6√(x+3)+x+3 \n 2-7x-9-x-3=6√(x+3) \n (-8x-10)^2=(6√(x+3))^2 \n64x^2+160x+100=36(x+3) \n 64x^2+160x+100=36x+108\n 64x^2+160x-36x+100-108=0 \n 64x^2+`124x-8=0 \n 4( 16x^(2) +31x-2)=0 \n$
$16x^(2) +31x-2=0 \n(x-2)(16x-1)=0 \n x+2=0 \n x=-2 \n 16x-1=0 \n x= (1)/(16)$

$\sqrt{2-7 \cdot(1)/(16) } - \sqrt{(1)/(16) +3} \neq 3 \n x=-2$

Is a triangle with sides of 9in, 25in, 24in a right triangle

Answers

Try the case if the triangle was a right triangle.
Then the longest side, 25, would be c or the hypotenuse.
9^2+24^2=25^2
81+576=625
657=625
This is not a true statement so the triangle is not a right triangle.

Hope this helps :)

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