Evaluate a treatment effect
A two-tailed hypothesis test is being employed to evaluate a treatment effect with a = .05. If the sample data produce a z-score of z = 2.24, then what is the correct decision?
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A normal distribution has a mean of µ = 80 with s = 20. What score separates the lowest 30% of the distribution from the rest of the scores?
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Based upon samples drawn from corresponding populations, in which of the following scenarios will conducting a two-proportion z-test be the most appropriate?
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