A research article reports that 4 of 10 students who received an intervention from a school social ...

A research article reports that 4 of 10 students who received an intervention from a school social worker dropped out of school, while 6 of 10 students in the control group dropped out. The difference was not statistically significant. What can be inferred from these statistics?
 
  A) The social worker's intervention was not effective.
 B) The social worker's intervention was effective, but just not at a statistically significant level.
 C) The same difference in drop out rates with a much larger sample might be statistically significant.
 D) The same difference in drop out rates with a smaller sample might be statistically significant.

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Which of the following hypotheses assumes that there is no relationship between two variables?
 
  A) Research
 B) Null
 C) Alternate
 D) Secondary
 E) Substantive

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The term clinical significance means the same thing as substantive significance.
 
  Indicate whether the statement is true or false