The given statement about the correlation between two variables is; False
<h3>Pearson's correlation coefficient </h3>
Pearson's correlation coefficient is the measure of linear correlation between two sets of data.
Pearson's r is always between the values of -1 and +1. 
In that range, -1 denotes a perfect negative while +1 denotes a perfect positive relationship and 0 denotes the perfect absence of a relationship. 
Finally, Pearson's r is symmetric and as such the correlation between two variables x and y must be the same as the correlation between y and x. 
Thus, if the correlation between x and y is 0.8, then the correlation between y and x must be also 0.8 and not -0.8 as the question states. 
Read more about Pearson's correlation coefficient at; brainly.com/question/4117612 
 
        
             
        
        
        
The statement that is most correct is (b) In Grade 8, 17% of students liked running.
<h3>How to interpret the two-way frequency table</h3>
<u>The students that like swimming</u>
From the table, we have the following highlights
- 24% students like swimming in grade 8
- 18% students like swimming in grade 9
<u>The students that like running</u>
From the table, we have the following highlights
- 17% students like running in grade 8
- 14% students like running in grade 9
<u>The students that like volleyball</u>
From the table, we have the following highlights
- 5% students like volleyball in grade 8
- 54% students like volleyball in grade 9
When the above highlights are compared to the given options, the correct statement is (b) In Grade 8, 17% of students liked running.
Read more about two-way frequency table at:
brainly.com/question/26313274
 
        
             
        
        
        
Answer:
Zn(NO3)2  +Cu 
Explanation:
Replacement  reaction  is  a   type  of  chemical reaction in  which   an  element  react  with  a  compound  and  take the  place  of another  element  in that compound.
 Zn  is  more reactive than  Cu, therefore Zn replaces   cu from   CU(NO3)2  to form  Zn(NO3)2  +Cu