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Oduvanchick [21]
3 years ago
13

Nicole and Elena wanted to know if listening to music at a louder volume negatively impacts test performance. To investigate, th

ey recruited 30 volunteers and randomly assigned 10 volunteers to listen to music at 30 decibels, 10 volunteers to listen to music at 60 decibels, and 10 volunteers to listen to music at 90 decibels. While listening to the music, each student took a 10-question math test. Given is computer output from a least-squares regression analysis using = volume and = number correct.
Predictor Coef SE Coef T P
Constant 9.9000 0.7525 13.156 0.0000
Volume - 0.0483 0.0116 -4.163 0.0003

S = 1.55781 R-Sq = 38.2% R-Sq (adj) = 36.0%

What is the P-value of this test?
Interpret the P-value of this test.
Assuming the slope of the true regression line relating
y = performance on the 10-question math test to x = volume of the music is _______, there is a _____ probability of getting a sample slope of ________ by chance alone.
Mathematics
1 answer:
Illusion [34]3 years ago
7 0
Ok so first off if you want to find the valume to take the b and the h and multiply it by the edges then you get the answer hope this helps!!
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Solve for x.<br><br> x/2≥−4<br><br> x≥−8<br><br> x≥−2<br><br> x≤−2<br><br> x≤−8
Arlecino [84]
I hope this helps you


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4 years ago
A jar contains only​ pennies, nickels,​ dimes, and quarters. There are 29 ​pennies, 13 ​dimes, and 21 quarters. The rest of the
aleksklad [387]

Answer:

First Question: <u>63 coins are not nickels.</u>

Second Question: <u>63+n=91</u>

Step-by-step explanation:

For your first question: 29+21=50 and 50+13=63. 63 coins are not nickels.

For your second question: You can do 29+21+13+n=91, I just simplified and said 63+n=91. You can choose.

Hope that this helps! Good luck with what you're working on!

6 0
3 years ago
Read 2 more answers
PLEASE HELP!!! <br> show work if possible!:)
satela [25.4K]

Answer:

The answer to your question is y = 2x + 11

Step-by-step explanation:

Data

Original line   y = -(1/2)x + 5

Point (-4, 3)

Process

1.- Get the slope of the new line

- Slope of the original line = -1/2

  If the lines are perpendicular, the slopes must be reciprocal

                       -1/2  reciprocal = 2

2.- Get the equation of the new line

          y - y1 = m(x - x1)

          y - 3 = 2(x + 4)

- Simplification

         y - 3 = 2x + 8

- Solve for y

        y = 2x + 8 + 3

        y = 2x + 11

7 0
3 years ago
Read 2 more answers
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