The distinguishing feature of the true experimental designs,as compared to preexperimental designs,is lack of randomization.
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Q21: Field experiments have some advantages over laboratory
Q22: Descriptive survey studies do not meet all
Q23: Quasi-experimental designs are useful because they can
Q24: Also known as the after-only design,the one-shot
Q25: Time series design is a quasi-experimental design
Q27: In practice,a control group is sometimes defined
Q28: When more than one variable must be
Q29: The Internet can provide a mechanism for
Q30: All of the types of experimental designs
Q31: Experimental designs may be classified as preexperimental,true
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