You may need to use the appropriate appendix table or technology to answer this question. A random sample of 85 airline pilots recruited by an airline service had an average yearly income of $99,000 with a standard deviation of $11.000. (a) If we want to determine a 95% confidence interval for the average yearly income of the population, what is the value of t? (Round your answer to three decim places.) - 1.000 x (b) Develop a 95% confidence interval for the average yearly income of all pilots (in dollars). (Round your answers to the nearest dollar) $97.915 X to's 101.005

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