A report on the U.S. economy claims that 28% of Americans have experienced difficulty in making mortgage payments. A newsorganization randomly sampled 400 Americans from 10 cities judged to be especially economically depressed and found that 136reported such difficulty. This may indicate that the problem is MORE SEVERE among these cities. What are the correct null andalternative hypotheses for testing such a claim?Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.H_0: ps0.28 & H_a: p>0.28H_0: p= 0.28 & H_a: p 0.28H_0: p> 0.28 & H_a: p= 0.28H_0: p<0.28 & H_a: p= 0.28

Given : population proportion , p = 0.28

Answered: organization randomly sampled 400…

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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Slove the Following: #1. If n=490 and ˆpp^ (p-hat) =0.46, find the margin of error at a 99% confidence level. Give your answer to three decimals #2. In a recent poll, 340 people were asked if they liked dogs, and 31% said they did. Find the margin of error of this poll, at the 95% confidence level. Give your answer to three decimals #3. If n = 540 and ˆpp^ (p-hat) = 0.7, construct a 99% confidence interval.Give your answers to three decimals. #4. Out of 300 people sampled, 279 had kids. Based on this, construct a 90% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places. #5. A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 4% margin of error at a 95% confidence level, what size of sample is needed? Give your answer in whole people. #6. Assume that a sample is used to estimate a population proportion p. Find the 90%…
a data set includes 109 body temperatures of healthy adult humans having a mean of 98.3 f and a standarddeviationn of 0.54F construct a 99% confidence interval estimate of the human body temperature of all healthy humans. What does the sample suggest about the use of 98.6 F as the mean body temperature?
80 birds part of an experiment are given the time to choose what to eat of 3 options of worms. Results indicate that 33 choose species [one], 12 choose species [two], 35 choose species [three]. Conduct a chi-square analysis to test equal preference. obtained X^2 calc=15.12 and X^2 critical=5.991. How should a conclusion be written specifying the preference.
The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level, and a score of 299 is "proficient." Scores for a random sample of 1100 eighth-graders in Dallas had x = 264 with standard error 1.3. TUDA results for 2019 from the National Center for Education Statistics, at https://www.nationsreportcard.gov. LO 5 DEC 1 S tv ♫ ♫ O Macmillan Learning (c) Is there good evidence that the mean for all Dallas eighth-graders is different from the basic level? F8 OYes, because the sample mean of 264 is not included in the 99% confidence interval. Yes, because the basic level of 262 is not included in the 99% confidence interval. O No, because the basic level of 262 is included in the 99% confidence interval. O No, because the sample mean of 264 is included in the 99% confidence interval. N 1917 66 7 A 72 P GE zoom
A random sample of size 16 has 53 as mean. The sum of 3quares of deviations from mean is 150. Can this sample be regarded as taken from the population having 56 as mean ? Also obtain 95% confidence limits for the mean. (tis = 2.131, 116 = 2-602) %3D
What is the z0 and Pvalue ?
Question 6 with clear expectations, and diagram please
Researchers are interested in determining the percentage of California community college students who intend to transfer to a CSU. How many community college students should be sampled in order to make this estimate with a 98% confidence interval of length 6%? Show all work including formula used and labeled sketch. Give your answer as a sentence.
he CDC is collecting data on the number of people infected with COVID. They use their SRS to estimate the number of infected Americans to be 50,000 with a margin of error of 5,000 with 95% confidence. Is it possible that only 42,000 Americans are infected?
Female Physicians The percentage of physicians who are women is 27.9%. In a survey of physicians employed by a large university health system, 48 of 119 randomly selected physicians were women. Is there sufficient evidence at the 0.10 level of significance to conclude that the proportion of women physicians at the university health system exceeds 27.9%? Part 1 of 5 (a) State the hypotheses and identifv th TI thesis test is a one-tailed test. Ti cal value is .28 Part: 2 /5 Part 3 of 5 (c) Compute the test value. Round the sample proportion to three decimal places and z score values to at least two decimal places.
I dont understand the following equation What is the margin of error for the 90% Confidence level? I can't seem to see how this is calculated

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organization randomly sampled 400 America reported such difficulty. This may indicate th alternative hypotheses for testing such a cla Select an answer and submit. For keyboard navigati H_0: ps0.28 & H_a: p> 0.28 b H_0: p= 0.28 & H_a: p#0.28 H_0: p>0.28 & H_a: p= 0.28 H_0: p<0.28 & H_a: p= 0.28