Which of the following statements demonstrates a negative correlation between two variables?
A. People who play baseball more tend to have more hits
B. Shorter people tend to weigh less than taller people
C. Tennis balls that are older tend to have less bounce
D. Cars that are older tend to have higher mileage
A negative correlation means as one variable increases, the other variable decreases or as one variable decreases, the other variable increases. Based on this definition, we analyze the given statement as follows:
People who play baseball more tend to have more hits is POSITIVE CORRELATION
Shorter people tend to weigh less than taller people is a POSITIVE CORRELATION
Tennis balls that are older tend to have less bounce is a NEGATIVE CORRELATION
Cars that are older tend to have higher mileage is a POSITIVE CORRELATION
Therefore, the Correct Answer is C.
More Questions on TEAS 7 Math
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Q #1: Which of the following percentages is equivalent to 5 ¼ ?
A. 525%
B. 514%
C. 5.25%
D. 5.14%
Answer Explanation
The percent equivalent of a fraction is obtained by multiplying the by frication by 100%.
Convert 5 ¼ into improper faction as follows
So, the percent equivalent is:
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Q #2: Which of the following is the best estimate in meters for the average width of a doorway?
A. 0.5
B. 1.0
C. 10.0
D. 3.0
Answer Explanation
Standard interior doors typically range from 0.7 to 0.9 meters in width and 2.0 to 2.1 meters in height. Thus, the average width of the doorway is about 1.0 m.
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Q #3: (x/y)-z=rw Solve for x in the equation above.
A. X=y(z+rw)
B. X=rw(y-z)
C. X=rwy+z
D. X=rwy-z
Answer Explanation
Given the equation (x/y)-z=rw, we make x the subject of the formula as follows:
(x/y)-z=rw
Add z to both sides of the equation
(x/y)-z+z=rw+z
(x/y)=rw+z
Multiply both sides by y
(x/y)*y=y(rw+z)
X=y(rw+z)
Rearranging the equation results in:
X = y(z+rw)
