Question

a bathroom scale claims to be able to identify correctly any weight within a pound. you think that it cannot be that accurate. what type of test would you use? a. a left - tailed test b. a right - tailed test c. a two - tailed test

Explanation:

A two - tailed test is used when we are interested in deviations in either direction from a hypothesized value. Here, the scale claims to be accurate within a pound. If we think it's not that accurate, we are not just concerned about it being less accurate (left - tailed) or more accurate (right - tailed) but about inaccuracy in either direction (either over - estimating or under - estimating the weight by more than a pound).

Answer:

c. A two - tailed test