Question: 7.5 SOC A random sample of 423 Albertans has finished an average of 12.7 years of formal education with a standard deviation of 1.7. Is

7.5 SOC A random sample of 423 Albertans has finished an average of 12.7 years of formal education with a standard deviation of 1.7. Is this significantly different from the national average of 12.2 years?

7.6 SOC A sample of 105 workers in the Roadster Division of the Toy Car Factory earns an average of $24,375 per year. The average salary for all workers is $24,230 with a standard deviation of $523. Are workers in the Roadster Division overpaid?
Conduct both one- and two-tailed tests.

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