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tester [92]
4 years ago
6

What is the r-value of the following data to three decimal places?

Mathematics
2 answers:
ValentinkaMS [17]4 years ago
7 0

Answer:

Option B

Step-by-step explanation:

Given that two variables in table as

                                            Total     Average

x              2   6   7   8   12       35          7

y             15  13   9   8    5        50         10

xy            30 78 63 64  60     295        59

(x-7)^2   25      1  0     1   25        52     10.4

(y-10)^2   25   9   1      4   25     64        12.8

Var x = 10.4 and std dev x = 3.225

Var Y = 12.8 and std dev Y = 3.578

Cov (xy) = E(xy)-E(x) E(Y)=59-70=-11

Correlation coefficient r

= Cov /sx sy = -11/(3.225)(3.578)=-0.9532

Round off to get

r=-0.953

Henceoption B is right.

Ann [662]4 years ago
3 0

Answer:

B. -0.953

Step-by-step explanation:

Apex

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3 years ago
If you multiply two binomials together, what type of polynomial will the product be?
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Depends
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7 0
3 years ago
7. Which of these is equivalent to the expression 8+8+8+8+12?
LenKa [72]

Answer:

Step-by-step explanation:

There are four 8s, so s should represent one 8.

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4 0
2 years ago
A campus apartment has two bedrooms and two attached bathrooms and rents for $1,025 per month plus an average of $60 per month f
Zanzabum

I can save $2,128 in my academic year and my roommate can save $392 in their academic year.

Step-by-step explanation:

Total housing amount= rent + electricity= $1,025 + $60= $1,085 per month

My rent is 40% of $1,085 which equals $434 a month while my roommate’s rent would be 60% of $1,085 which equals $651 a month.

The scholarship gives me $700 a month for housing out of which I spend $434 and my roommate spends $651.

I save; $700 - $434 = $266 a month

My roommate saves; $700 - $651 = $49 a month.

An academic year lasts for 8 months so my savings= $266 x 8 = $2,128

My roommate’s savings= $49 x 8 = $392  

4 0
3 years ago
Read 2 more answers
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