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aliya0001 [1]
2 years ago
10

-Anyone wanna help a sister out??-

Mathematics
2 answers:
GalinKa [24]2 years ago
5 0
The answer would be A because a <span>correlation coefficient is only </span>-1 \leq r \leq 1
Scrat [10]2 years ago
3 0

Answer:

Option A - The researcher made an error because −1 ≤ r ≤ 1.

Step-by-step explanation:

Given : A researcher is trying to find out if there is a correlation between the U.S. economy and the number of hours spent on social media. The researcher determines that the correlation coefficient is r = 1.26.

To find : What does this value mean?

Solution :

By definition of correlation coefficient,

The correlation coefficient r measures the strength and direction of a linear relationship between two variables on a scatter plot.

The value of r is always between +1 and –1 i.e, -1\leq r\leq 1

According to researcher,

The correlation coefficient is r = 1.26 >1

So, From the options it means

The researcher made an error because −1 ≤ r ≤ 1.  

Therefore, Option A is correct.

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Can someone tell me if I did this right? If it's wrong can you tell me how to do it step by step? Thanks
Lesechka [4]

Hi there!

So first off, here are little definitions you need to know in order to be able to answer your question :

<u>Constant</u> means that the rates of change are the same.

<u>Variable</u> means that the rates of change are different.


But from what I can see, you don't even need those definitions because you got both answers right!


Continue your great work! If there's anything just let me know! :)

6 0
3 years ago
Find the value of x and y <br> (5y-23) <br> (2x+13)<br> (3x)<br> 47
liq [111]

Answer:

x = 24

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Step-by-step explanation:

7 0
2 years ago
20 POINTS<br> How do you find the interquartile range
kari74 [83]

Answer:

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Step-by-step explanation:

(Khan Academy)

3 0
2 years ago
Read 2 more answers
No one is answering i posted this question 2 times, this is my 3rd time please answer.
Dahasolnce [82]

Answer:

13

Step-by-step explanation:

First, fill in 3 boxes of the table using the given information (blue numbers on the attached table)

"Of the 32 students that have a cell phone, 19 students do not have a tablet."

The top row of the table is students who have a cell phone.  Therefore, place 19 in the box in this row that is in the "no tablet" column.

"Of the 70 students that have a tablet, 57 students do not have a cell phone."

The first column of the table is students who have a tablet.  Therefore, place 57 in the box in the 2nd row of this column.

"11 students do not have a cell phone or a tablet."

Find the "no cell phone" row and the "no tablet" column and place 11 in the box that coincides.

We can calculate the blank totals using addition (shown by green numbers on the attached table)

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To calculate the number of students who have a cell phone AND a tablet:

⇒ Total students with a cell phone <em>minus</em> students with a cell phone but no tablet

⇒ 32 - 19 = 13

4 0
2 years ago
I forget how to do this help I'll give brainliest ​
Gnoma [55]
50 since a triangle has to equal 180, trust!
6 0
3 years ago
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