Glaucoma is the leading cause of blindness in the United States. N. Ehlers measured the corneal thickness of nine patients who had glaucoma in one eye but not in the other. The following are the data on corneal thickness, in microns. Normal 484 478 492 444 430 398 464 404 476 Glaucoma 488 478 480 426 440 410 458 395 460 Construct and interpret a 95% confidence interval for the true mean difference in the mean corneal thickness in normal eyes and eyes with glaucoma. For credit, your work must include a filled out formula for your confidence interval. If it helps, you may follow the steps outlined in the previous problem.

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Glaucoma is the leading cause of blindness in the United States. N. Ehlers measured the corneal thickness of nine patients who had glaucoma in one eye but not in the other. The following are the data on corneal thickness, in microns.

Normal 484 478 492 444 430 398 464 404 476

Glaucoma 488 478 480 426 440 410 458 395 460

Construct and interpret a 95% confidence interval for the true mean difference in the mean corneal thickness in normal eyes and eyes with glaucoma. For credit, your work must include a filled out formula for your confidence interval. If it helps, you may follow the steps outlined in the previous problem.

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