Problem 1Left-handed people are rare. Suppose a researcher conducts a survey of 30 people and findsthat 4 of them are left handed.(a) Construct a 95% confidence interval to estimate the true proportion of left-handed peoplein the population. Also, interpret the interval.(b) Research suggests that 11% of the population are left-handed. Assess this claim usingyour answer from (a).(c) Suppose another researcher conducts a similar sur vey of 61 people and finds that 10 ofthem are left handed. Use a 95% confidence interval compare the results of the twoTsurveys. What difference is there (if any)?

The random variable left-handed people follow normal distribution. We have to construct the 95%…

Answered: Left-handed people are rare. Suppose a…

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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The figure to the right shows the results of a survey in which 1018 adults from Country A, 1025 adults from Country B, 1005 adults from Country C, 999 adults from Country D, and 999 adults from Country E were asked whether national identity is strongly tied to birthplace. Construct a 95% confidence interval for the population proportion of adults who say national identity is strongly tied to birthplace for each country listed. The 95% confidence interval for the proportion of adults from Country A who say national identity is strongly tied to birthplace is (____),(____) The 95% confidence interval for the proportion of adults from Country B who say national identity is strongly tied to birthplace is (____),(____) The 95% confidence interval for the proportion of adults from Country C who say national identity is strongly tied to birthplace is (____),(____) The 95% confidence interval for the proportion of adults from Country D who say national identity is strongly tied to…
Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)
We survey 1004 teens age 13-19, we record whether or not they have had sex education. 817 respond that they have had some form of sex education. (a) Construct a 99% confidence interval for teens who have not had sex education. (b) How many teens would we have to sample in order to cut the margin of error in half?
When 258 college students are randomly selected and surveyed, it is found that 106 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.
10. Several years ago, 51% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,075 surveyed, 472 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p (1) versus H1: p (2) (Round to two decimal places as needed.) Use technology to find the 99% confidence interval. The lower bound is The upper bound is (Round to two decimal places as needed.) What is the correct conclusion? O A. Since the interval contains the proportion stated in the null hypothesis, there is insufficient evidence that parents' att O B. Since the interval contains the proportion stated in the null hypothesis, there is sufficient…
You are interested in constructing a 99% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 407 randomly selected caterpillars observed, 43 lived to become butterflies. Round answers to 4 decimal places where possible.
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In a survey of 2322 adults, 729 say they believe in UFOS. Construct a 90% confidence interval for the population proportion of adults who believe in UFOS. A 90% confidence interval for the population proportion is (.). (Round to three decimal places as needed.)

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