Interpret the level of statistical significance for the event described.
-A study of two types of weed killers was done. One weed killer killed 45% more weeds than the other. This difference was significant at the 0.05 level. What does this mean?
A)The probability that one weed killer performed better by chance alone is less than a 0.05.
B)The probability that the difference was due to chance alone is greater than 0.05.
C)The improvement was due to the fact that there were more weeds in one study.
D)There is not enough information to make any conclusion.

Question

Quizplus · Accepted Answer

The level of statistical significance at the 0.05 level means that there is less than a 5% probability that the observed difference in the effectiveness of the two weed killers occurred by chance alone.

Interpret the Level of Statistical Significance for the Event Described