Is this Correct? If not what did I do wrong? (25 points)
1 answer:
Answer:
See image attached
Step-by-step explanation:
I've overlaid answers on boxes where I found a mistake. The third column is not checked because I could not read the scales (resolution too low), however, from my correction you should be able to check the third column easily. If you have any questions please post them in the comments.
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Answer:
Option A :-
Step-by-step explanation:
Simplify the expression
Transform the Expression
Calculate
Answer:
For this case the value of r = -0.66
Now we can calculate the determination coeffcient:
And then we can conclude that 43.56% of the variation in y can be explained by the explanatory variable
And then 100-43.56 = 56.44 % of the variation in y that cannot be explained by the explanatory variable
Step-by-step explanation:
For this case we need to calculate the slope with the following formula:
Where:
And we can find the intercept using this:
And the model obtained for this case is:
The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.
And in order to calculate the correlation coefficient we can use this formula:
For this case the value of r = -0.66
Now we can calculate the determination coeffcient:
And then we can conclude that 43.56% of the variation in y can be explained by the explanatory variable
And then 100-43.56 = 56.44 % of the variation in y that cannot be explained by the explanatory variable