What is the standard error for the estimate

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Reference no: EM131793007

Osteoarthritis

In a random sample of 1800 persons aged 65 and over, the proportion with osteoarthritis was found to be 0.225 (or 22.5%).

a. What is the standard error for the estimate of the proportion of all person aged 65 and over with osteoarthritis?

b. Find the margin of error, using a 95% confidence level, for estimating this proportion.

c. Report the 95% confidence interval for the proportion of all persons of aged 65 and over with osteoarthritis.

d. According to patient.info, 50% of all persons aged 65 and over have osteoarthritis. Does the confidence interval you found in part c support or refute this claim? Explain.

Reference no: EM131793007

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