Surgical complications: A medical researcher wants to construct an 80% confidence interval for the proportion of...

Question

Question

Surgical complications: A medical researcher wants to construct an 80% confidence interval for the proportion of knee replace

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

Given that, Margin of error, E=0.013 P=0.09 ., 1- Þe 1-0.09- 0.91 At 80% confidence level the zis, -1-80% - 1-0.80 0.20 Zal=

Add a comment

Answer 2

Similar Homework Help Questions

Surgical complications: A medical researcher wants to construct an 80% confidence interval for the proportion of...

Surgical complications: A medical researcher wants to construct an 80% confidence interval for the proportion of knee replacement surgeries that result in complications. alo Part 1 of 2 (a) An article in a medical journal suggested that approximately 9% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03? A sample of 150 operations is needed to obtain an 80% confidence interval with...
Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the...

Question 9 (1.5 points) A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in the Journal of Bone and Joint Surgery suggested that approximately 8% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of o.023 2 Write only an integer as your answer. Your Answer Answet Save Question 10...
Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion...

Question 19 (5 points) A pollster wants to construct a 95% confidence interval for the proportion of adults who believe that economic conditions are getting better. A Gallup poll taken in July 2010 estimates this proportion to be 0.33. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.039? Write only an integer as your answer. Your Answer: Answer Question 20 (5 points) A researcher wants to construct a...

A pollster wants to construct a 95% confidence interval for the proportion of children who watch...

A pollster wants to construct a 95% confidence interval for the proportion of children who watch Spongebob Squarepants. Estimate the sample size needed so that the confidence interval will have a margin of error of 0.061 ? Write only an integer as your answer.
A researcher wants to create a 90% confidence interval for the population proportion, with the margin...

A researcher wants to create a 90% confidence interval for the population proportion, with the margin of error of 3%. She has no idea what the population proportion is and she cannot take a trial sample. Calculate the required sample size.
Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion...

Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when the margin of error equals 5% . a.p 0.70 b. p 0 80 c.p 0 90 Click the icon to view a table of standard normal cumulative probabilties a, nm (Round up to the nearest integer) Determine the sample sizen needed to construct a 95% confidence interval to estimate the population proportion for the following sample proportions when...

Kim wants to determine a 80 percent confidence interval for the true proportion of high school...

Kim wants to determine a 80 percent confidence interval for the true proportion of high school students in the area who attend their home basketball games. How large of a sample must she have to get a margin of error less than 0.03? [To find n, use the value p* = 1/2 for the sample proportion and the values for z* from a z-table or t-table.] [Round to the smallest integer that works.] n =
Cora wants to determine a 80 percent confidence interval for the true proportion of high school...

Cora wants to determine a 80 percent confidence interval for the true proportion of high school students in the area who attend their home basketball games. How large of a sample must she have to get a margin of error less than 0.03? [To find n, use the value p* = 1/2 for the sample proportion and the values for z* from a z-table or t-table.] [Round to the smallest integer that works.] n =
A researcher in campaign finance law wants to estimate the proportion of elementary, middle, and high...

A researcher in campaign finance law wants to estimate the proportion of elementary, middle, and high school teachers who contributed to a candidate during a recent election cycle. Given that no prior estimate of the population proportion is available, what is the minimum sample size such that the margin of error is no more than 0.03 for a 95% confidence interval?

A researcher wants to construct a 99% confidence interval for the proportions of people who changed...

A researcher wants to construct a 99% confidence interval for the proportions of people who changed employment in the past year. What sample size is needed so that the confidence interval will have a margin of error of 0.072? Write only an integer as your answer

Surgical complications: A medical researcher wants to construct an 80% confidence interval for the proportion of...

Homework Answers