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FICO Credit Scores data set 24 appendix B includes a simple random of FICO credit rating scores. As of this writing, the mean FICO score was reported...

FICO Credit Scores data set 24 appendix B includes a simple random of FICO credit rating scores. As of this writing, the mean FICO score was reported to be 678. Use a 0.05 signficance level to test the claim that the sample of FICO scores comes from a population with a mean equal to 678.

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