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Check all that are true:

- The 100 volunteers were randomly assigned to the two groups.
- Normality - large counts condition.
- Since this was an experiment, the 10% condition does not apply.

Answer :

Final answer:

The question revolves around the principles of random assignment and conditions for valid statistical inference in experimental designs, confirming the equivalence of the groups before manipulations and clarifying the irrelevance of the 10% condition in experimental setups.

Explanation:

The question pertains to the conditions necessary for the valid implementation of a randomized experimental study design. In particular, it mentions the process of random assignment to experimental and control groups to ensure that, prior to any experimental intervention, both groups are equivalent in all variables that could affect the study's outcome.

The mention of the large counts condition relates to an assumption used in inferential statistics, such as normality, which plays a critical role in ensuring the appropriateness of statistical methods such as ANOVA. Here, this could mean that sufficient sample sizes are present in each group to approximate a normal distribution of data points.

Additionally, the statement 'the 10% condition would not apply' indicates that in the context of an experiment, as opposed to sampling procedures, concerns about sampling without replacement from a finite population (which the 10% condition addresses) are not relevant.

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