19. When the interest is to determine if a relationship between two variables exists, which of the following graphs is more appropriate?
|
A. |
Bar graph |
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|
B. |
Ogive |
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|
C. |
Histogram |
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|
D. |
Scatter Plot |
21. The third quartile (Q3) of data on ages of students in a college is found to be 26. Which of the following is true?
|
A. |
50% of the students in this college are younger than 26 years |
|
|
B. |
75% of the students in this college are older than 26 years |
|
|
C. |
75% of the students in this college are younger than 26 years |
|
|
D. |
50% of the students in this college are older than 26 years |
