Reading proficiency: An educator wants to construct a 98% confidence interval for the proportion of elementary school children in Colorado who are proficientin reading.Part: 0/ 3Part 1 of 3(a) The results of a recent statewide test suggested that the proportion is 0.75. Using this estimate, what sample size is needed so that the confidenceinterval will have a margin of error of 0.04?A sample ofelementary school children is needed to obtain a 98% confidence interval with a margin of error of 0.04.NOVMacBook Air吕0DIIDDF2F3F4FSF6F7F8F10@%23$%&346

Given Pcap=0.75 1-pcap=0.25 Margin of error (n) =4%=0.04

Answered: Reading proficiency: An educator wants…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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According to a poll, 79% of California adults (398 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California. Find a 90% confidence interval for the population proportion. (Round your answers to three decimal places.) Additional Materials Reading
Next question If a sample proportion is 0.68, which of the following could be a 90% confidence interval for the population proportion? ..... Select all that apply. A. Lower bound: 0.59; Upper bound: 0.77 B. Lower bound: 0.66; Upper bound: 0.70 OC. Lower bound: 0.50; Upper bound: 0.77 D. Lower bound: 0.77; Upper bound: 0.95 E. Lower bound: 0.67; Upper bound: 0.71 F3 F4 F5 F7 F8 24 4. %23 2 3. 6. Left control option command
Early-childhood-development studies indicate that the more often a child is read to from birth, the earlier the child begins to read. A local parents’ group wants to test this theory and samples families with young children. They find the following results. Construct a 99% confidence interval to estimate the true difference between the proportions of children who read at an early age when they are read to frequently compared to those who were read to less often, as described in the table of results. Let Population 1 be the children who were read to frequently and Population 2 be the children who were read to less often. Round the endpoints of the interval to three decimal places, if necessary. Ages when Children Begin to Read Read to at Least Three Times per Week Read to Fewer than Three Times per Week Started Reading by age 4 60 35 Started Reading after age 4 36 51 Lower end point: Upper end point:
you conducted additional studies with these men and found the following: a. The RR for those who drank one drink per day was 1.50 (95% CI:1.32-1.67) in comparison to the abstainers. b. For those men who drank three or more drinks per day the RR compared to the abstainers was 4.20 (95% CI 2.68-5.85). Question: We can tell from the Confidence Intervals provided in #7 whether there are likely more people in the “one drink a day” group or the “3+ drinks per day” group. Which one likely has more people and how can we tell?
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 estimate 0.15 for p.
in a poll, 73% of California adults (367 out of 506 surveyed) believe that education is one of the main issues facing California. We want to construct a 90% confidence interval for the true proportion of California adults who believe that education is one of the main issues facing California.- I need help with finding a 90% confidence interval for the population proportion (I also have to round the answer to three decimal places)

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