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________?

In statistics, conducting a survey means________?

A random variable X has binomial distribution with n = 10 and p = 0.3 then variance of X is:________?

The range of partial correlation coefficient?

Average is good if it is easy to ________?

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