A probability calculated in only one tail of the distribution is called a "one-tailed probability" and probability calculated in both tails of a distribution is called a "two-tailed probability." You ...A probability calculated in only one tail of the distribution is called a "one-tailed probability" and probability calculated in both tails of a distribution is called a "two-tailed probability." You should always decide whether you are going to use a one-tailed or a two-tailed probability before looking at the data.
A probability calculated in only one tail of the distribution is called a "one-tailed probability" and probability calculated in both tails of a distribution is called a "two-tailed probability." You ...A probability calculated in only one tail of the distribution is called a "one-tailed probability" and probability calculated in both tails of a distribution is called a "two-tailed probability." You should always decide whether you are going to use a one-tailed or a two-tailed probability before looking at the data.