Random assignment:. a. ensures that studies can be replicated. b. is a good way to define the dependent variable. c. is difficult to achieve in research. d. must be used with great caution. e. minimizes any potential differences between the control and experimental groups.

E - minimizes any potential differences between the control and experimental groups.

Explanation:

As the exercise answers, a random assignment minimizes any potential differences between the control and experimental groups. As it's name suggests, the random assignment/placement is an experimental technique for assigning the individuals participating in different groups, making it less biased with a randomization procedure. For example, when in school we are creating two teams for practising let's say, basketball, if to make it random we try and draw straws or flip coins or something of the sort, we are using a random assignment.

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what is the tax base for the sales tax?

it should be (usually ) 6%