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nata0808 [166]
2 years ago
7

Part A: solve -np - 70 < 40 for n show your work

Mathematics
1 answer:
serg [7]2 years ago
8 0
Step 1. Add 70 to both sides

-np\ \textless \ 40+70

Step 2. Simplify 40 + 70 to 110

-np\ \textless \ 110

Step 3. Divide both sides by p

-n\ \textless \  \frac{110}{p}

Step 4. Multiply both sides by -1

n\ \textgreater \ - \frac{110}{p}

Done! :)
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Step-by-step explanation:

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The table shows the time a patient spends at the dentist and the amount of the bill.
erica [24]

<u>Answer-</u>

Correlation coefficient for the data in the table was found to be 0.93.

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Taking the independent variable or input variable as, the time a patient spends at the dentist and the dependent variable or output variable as the amount of the bill.

We know that,

r=\frac{n(\sum xy)-\sum x \sum y}{\sqrt{[n\sum x^{2} -({\sum x})^{2}]\times [n\sum y^{2} -({\sum y})^{2}]}}


Calculating the values from the table, then putting it in the formula

r=\frac{4 \times 3130.9 \ - \ 6.45 \times 1473}{\sqrt{[4\times 12.3725 \ - \ 6.45^{2}][4 \times 877475 \ - \ 1473^2]}}

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∴  Correlation coefficient for the data is 0.93.


3 0
3 years ago
Read 2 more answers
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