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?
◦ There is not enough information to make any conclusion.
◦ The improvement was due to the fact that there were more weeds in one study.
◦ The probability that one weed killer performed better by chance alone is less than a 0.05.
◦ The probability that the difference was due to chance alone is greater than 0.05.