Question: 35. A recent study shows that the average annual incomes of cardiologists and gastroenterologists based on random samples of 100 and 121 are $295,000 and

35. A recent study shows that the average annual incomes of cardiologists and gastroenterologists based on random samples of 100 and 121 are $295,000 and $305,000, respectively.

Furthermore, these samples yield sample standard deviations of $10,600 and

$12,800, respectively. Determine a 98% confidence interval for the difference μ1 − μ2 of the two population means.

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