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n=200 older adults with glaucoma sample mean = 140 mmhg sample standard deviation= 25mmhg calculate a 95% confidence interval for the true mean systolic blood

n=200 older adults with glaucoma

sample mean = 140 mmhg

sample standard deviation= 25mmhg

calculate a 95% confidence interval for the true mean systolic blood pressure among the population of older adults with glaucoma.

What is the critical value?

what is the margin error?

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