The population mean of a standardized test on Cheerfulness is 50. An attitude coach who conducts self-improvement
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Question:
The population mean of a standardized test on Cheerfulness is 50. An attitude coach who conducts self-improvement workshops administered the test to a sample of his participants. The obtained sample mean was 55. Since the obtained sample mean was 5 points higher than the population mean can we, therefore, conclude that the workshop was effective? Why or why not?
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