Homework Chapter 7.3 2 Question 4 of 12 (1 point) I Question Attempt: 1 of Unlimited SAT scores: A college admissions officer sampled 115 entering fresh men and found that 36 of them scored less than 520 on the math SAT. Part: 0] 3 (a) Find a point estimate for the proportion of all entering freshmen at this college who scored less than 520 on the math SAT. Round the answer to at least three decimal places. The point estimate for the proportion of all entering freshmen at this college who scored less than 520 on the math SAT is D X Reading proficiency: An educator wants to construct a 95% confidence interval for the proportion of elementary school children in Colorado who are proficient in reading. (a) The results of a recent statewide test suggested that the proportion is 0.76. Using this estimate, what sample size is needed so that the condence interval will have a margin of error of 0.03? A sample of D elementary school children is needed to obtain a 95% condence interval with a margin of error of 0.03. Homework Chapter 7.3 Question 6 of 12 (1 point) | Question Attempt: 1 of Unlimited Surgical complications: A medical researcher wants to construct a 99.8% confidence interval for the proportion of knee replacement surgeries that result in complications. Part: 0 / 2 Part 1 of 2 (a) An article in a medical journal suggested that approximately 15% 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 operations is needed to obtain a 99.8% confidence interval with a margin of error of 0.03 using the X 5 estimate 0.15 for p.Homework Chapter 73 Question 7 of 12 (1 point) ' Question Attempt: 1 of Unlimited Changing jobs: A sociologist sampled 218 people who work in computerrelated jobs, and found that 46 of them have changed jobs in the past 6 months. Part: 0/ 2 (a) Construct an 80% confidence interval for the proportion of those who work in computer related jobs who have changed jobs in the past six months. Round the answer to at least three decimal places. An 80% condence interval for the proportion of those who work in computer-related jobs who have changed jobs in the b X past six months is I: