2003, mean annual spending per Medicare enrollee was $6,833 inwhole United States. To determinemean annual Medicare spending in Indianapolis was lower than the national mean, a researcher sampled 40 Medicare enrollees there. The sample mean was $5,980 and the standard deviation was $2,518. What is the 90% confidence interval for the population mean?
(5,199.66, 6,760.34) |
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(4,926.94, 7,033.06) |
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(5,317.77, 6,642.23) |
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(5,054.35, 6,905.65) |
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(5,470.39, 6,489.61) |
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