Answer:
42(79,42,32)
Step-by-step explanation:
I got the solution by using the Trigonometric Identities. If somebody else could do a step by step explanation that would be great.
Answer:
the numerical value of the correlation between percent of classes attended and grade index is r = 0.4
Step-by-step explanation:
Given the data in the question;
we know that;
the coefficient of determination is r²
while the correlation coefficient is defined as r = √(r²)
The coefficient of determination tells us the percentage of the variation in y by the corresponding variation in x.
Now, given that class attendance explained 16% of the variation in grade index among the students.
so
coefficient of determination is r² = 16%
The correlation coefficient between percent of classes attended and grade index will be;
r = √(r²)
r = √( 16% )
r = √( 0.16 )
r = 0.4
Therefore, the numerical value of the correlation between percent of classes attended and grade index is r = 0.4
Two events are mutually exclusive if they cannot occur in the same trial of an experiment.
Given the equation 
Check all options:
A. 
, this means that 
Substitute these numbers into the left side of the equation equation:
This option is false.
B. 
, this means that 
Substitute these numbers into the left side of the equation equation:
This option is false.
C. 
, this means that 
Substitute these numbers into the left side of the equation equation:
This option is false.
D. 
, this means that 
Substitute these numbers into the left side of the equation equation:
This option is true.
Answer: correct choice is D.
