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nikdorinn [45]
2 years ago
14

Help me dawg. I need this

Mathematics
1 answer:
prohojiy [21]2 years ago
8 0

The answer is Choice (A)

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Based on the dotplot of the simulation results and the
Sonbull [250]

Answer:

The conclusion to be drawn is:

The actual proportion of teenagers who do not smile  is only 8%.  It is clear that exactly 6 out of 10 teenagers will smile  in their driver's license photo.

If we continued to take more samples of 10  teenagers, the center of the distribution would shift to

Step-by-step explanation:

4 0
3 years ago
What is the value of the correlation coefficient r of the data set?
enyata [817]

The correct option will be:  C) 0.84

<u><em>Explanation</em></u>

Formula for Correlation coefficient :

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

First, for each point(x, y), we need to calculate x², y² and xy .

Then, we will find sum all x, y, x², y² and xy, which gives us Σx, Σy, Σx², ∑y² and Σxy

<em>(Please refer to the attached image for the table )</em>

Here we got, ∑x = 44 , ∑y = 183 , ∑x² = 362 , ∑y² = 6575 and ∑xy = 1480

'n' is the total number of data set, which is 7 here.

So, plugging those values into the above formula..........

r= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{\sqrt{[n\Sigma x^2-(\Sigma x)^2][n\Sigma y^2-(\Sigma y)^2]}}\\ \\ r=\frac{7(1480)-(44)(183)}{\sqrt{[7(362)-(44)^2][7(6575)-(183)^2]}}\\ \\ r=\frac{10360-8052}{\sqrt{(598)(12536)}}\\ \\ r=\frac{2308}{\sqrt{7496528}}\\ \\ r=0.84

So, the value of the correlation coefficient is 0.84

4 0
3 years ago
Read 2 more answers
Solve each quadratic equation. Show your work. 4x^2=100
ZanzabumX [31]
Hello there!

4x² = 100

We wanna start by dividing both sides by 4

4x²/4 = 100/4

x² = 25

Now we can take square root

x = +/-√25

x = 5 or x = -5

As always, it is my pleasure to help students like you!
4 0
3 years ago
F(x + 1) = 2x + 1<br> g(x + 1) = x-5<br> &gt; (fog)(2) = ?
My name is Ann [436]
Can you provide me with a picture so that I can help you answer this question?
8 0
3 years ago
Find measure of angles B, E, D and C and the length of BC.
melomori [17]

Answer:

< B = 180-30-65=85°

< E = 85°

< D = 30°

< C = 65°

BC = 20/35 × 28 = 16

6 0
3 years ago
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