Suppose that for Americans in the age group 18-24 years, sixty-eight percent had private health insurance. In the age group 25-34 years, the percentage is seventy-five. If we select a random sample of 273 Americans from the 18-24 age group and an independent random sample of 247 Americans from the age group 25-34, then the probability that the difference in percent of private health insurances is between -6% and 6% between the two groups is approximately: d. 0.6005 c. 0 a. 0.3995 b. 0.0019 e. 0.419

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