Correlation coefficient is________?

The sum of powers of deviation from mean is zero is called ________?

There are ________ probability sampling?

A graph of cumulative frequency distribution is called ________?

If E(x) is the expected value of X then E[x – E(x)]= ________?

Herbicide A has been used for years in order to kill a particular type of weed. An experiment is to be conducted in order to see whether a new herbicide, Herbicide B, is more effective than Herbicide A. Herbicide A will continue to be used unless there is sufficient evidence that Herbicide B is more effective. The alternative hypothesis in this problem is________?