A grade has 81 girls and 72 boys.The greatest split into groups that have the same ratio girls the boys as a whole grade. How ma
1 answer:
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We are asked to determine the correlation factor "r" of the given table. To do that we will first label the column for "Quality" as "x" and the column for "Easiness" as "y". Like this:
Now, we create another column with the product of "x" and "y". Like this:
Now, we will add another column with the squares of the values of "x". Like this:
Now, we add another column with the squares of the values of "y":
Now, we sum the values on each of the columns:
Now, to get the correlation factor we use the following formula:
Where:
Now we substitute the values, we get:
Solving the operations:
Therefore, the correlation factor is 0.858. If the correlation factor approaches the values of +1, this means that there is a strong linear correlation between the variables "x" and "y" and this correlation tends to be with a positive slope.
Answer:
E) None of the above
Step-by-step explanation:
Given and
, then
. This shifts the graph of the parent function
2 units to the left. Thus, the domain of the function is
, making none of the above true.