A federal report indicated that 29% of children under age 6 live in poverty in Arkansas, an increase over previousyears. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty inArkansas within 4% with 90% confidence? Round the intermediate calculations to three decimal places and roundup your final answer to the next whole number.n=allo

The random variable is children under age 6 who live in poverty in Arkansas.The value of the…

Answered: A federal report indicated that 29% of…

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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For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a marketing survey, a random sample of 728 women shoppers revealed that 630 remained loyal to their favorite supermarket during the past year (i.e., did not switch stores). (a) Let p represent the proportion of all women shoppers who remain loyal to their favorite supermarket. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit upper limit
A researcher claims that at least 10% of all football helmets have manufacturing flaws that could potentially cause injury to the wearer. A sample of 200 helmets revealed that 16 helmets contained such defects. Does this finding support the researcher's claim? Use a = 0.03. Find the P-value. The proportion of football helmets with flaws The P-value is i ✓ 10%. . Round your answer to four decimal places (e.g. 12.3456).
d. There is a 30% chance that X is above what value? X= (Type an integer or decimal rounded to two decimal places as needed.)
A federal report indicated that 28% of children under age 6 live in poverty in Kentucky, an increase over previous years. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty in Kentucky within 5% with 90% confidence? Round the intermediate calculations to three decimal places and round up your final answer to the next whole number. n =
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23% of the students graduating from a local high school received scholarships to college. If 163 students graduating received scholarships to college, how many students total graduated from the local high school? You must show work and explain your estimation. Estimation: Exact answer: (nearest whole number)
A federal report indicated that 23% of children under age 6 live in poverty in Ohio, an increase over previous years. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty in Ohio within 4% with 90% confidence? Round the intermediate calculations to three decimal places and round up your final answer to the next whole number. n=
The state education commission wants to estimate the proportion of tenth-grade students in the state who read at or below the eight-grade level. The commissioner wants an estimate with a 90% level of confidence and an error of at most 5%? Step 1 of 2 : Assuming the commissioner has no prior knowledge about the proportion, how large of a sample would be required for the commissioner to make the desired estimate? Round your answer up to the next integer.
A foundation conducted a survey of physicians' attitude about health care reform, calling the report "a survey of 100,000 physicians." The survey was sent to 100,000 randomly selected physicians practicing in the United States: 38,000 via post-office mail and 62,000 via email. A total of 2,474 completed surveys were received. What is the rate of nonresponse for this survey? (Round your answer to two decimal places.)
Calculate the 95% margin of error in estimating a population mean for the following values. (Round your answer to three decimal places.) 30,² = 1.2 n =
A recent study indicated that 24% of the 150 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions. How large a sample must you take to be 90% confident that the estimate is within 0.02 of the true proportion of women over age 55 who are widows?
Using the following scenario, calculate the value of the point estimate. What proportion of students are willing to report cheating by other students? A student project put this question to an SRS of 229 undergraduates at a large university: "You witness two students cheating on a quiz. Do you go to the professor?" Only 25 answered "yes". Round your answer to two decimal places.

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