Question Number (2) 2. A civil engineering firm issues every new employee with a safety helmet. Four different sizesare available numbered 1 to 4. A random sample of 40 employees required the followingsizes:OUTZ13241UTM45 UTM142223 1112 UTM 2 OUTM the4333122 221123OUTM UTM -4413i.Construct a 90% confidence interval for the proportion of employees requiring size3.OUTM JTMUTM AUTMii.The firm stated that at least 32% of the employees wear size 2 helmet. Determine at1% level of significance, whether the data provide sufficient evidence to support thefirm's claim.™MOUTM WhethUTM evidenUTMUTM342123UTM

Proportion is calculated by dividing the number of favorable observation divided by the sample size.…

Answered: 2. A civil engineering firm issues…

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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Consider the following sample information randomly selected from two populations. Sample 1: n1 =250, X1=30 Sample 2: n2 =100, X2= 33 a.) Calculate a 95% confidence interval for the difference between the two population proportions.
a researcher was interested in comparing the amount of time watching television by women and by men. Independent simple random samples of 14 women and 17 men were selected, and each person was asked how many hours he or she had watched television during the previous week. the summary statistics are as follows. Women x1=12.7 hours s1=3.9 hours n1=14 hours Men x2=14.1 hours s2=5.2 hours n2=17 hours Construct a 99% confidence interval for u1-u2, the difference between the mean amount of time watching television for women and the mean amount of time spent watching television for men
A U.S. Food Survey showed that Americans routinely eat beef in their diet. Suppose that in a study of 49 consumers in Illinois and 64 consumers in Texas the following results were obtained from two samples regarding average yearly beef consumption: Illinois Texas = 49 = 64 = 54.1lb = 60.4lb S1 = 7.0 S2 = 8.0 Develop a 95% confidence Interval Estimate for the difference between the two population means.
A researcher was interested in comparing the amount of time spent watching television by women and by men. Independent simple random samples of 14 women and 17 men were selected, and each person was asked how many hours he or she had watched television during the previous week. The summary statistics are as follows.women: x1=12.6 hrs, s1=3.9 hrs, n1=14.0 men : x2 = 14.0 hrs, s2= 5.2 hrs, n2= 17 Construct a 99% confidence interval for the difference between the mean amount of time spent watching television for women and the mean amount of time spent watching television for men.
The figure to the right shows the results of a survey in which 1005 adults from Country A, 1023 adults from Country B, 995 adults from Country C, 1020 adults from Country D, and 1012 adults from Country E were asked whether national identity is strongly tied to birthplace. Country A37%22%27%49%Country BCountry CCountry DCountry E10% Construct a 99% confidence interval for the population proportion of adults who say national identity is strongly tied to birthplace for each country listed. The 99% confidence interval for the proportion of adults from Country B who say national identity is strongly tied to birthplace is enter your response here ,enter your response here . (Round to three decimal places as needed.)
The figure to the right shows the results of a survey in which 1005 adults from Country A, 1023 adults from Country B, 995 adults from Country C, 1020 adults from Country D, and 1012 adults from Country E were asked whether national identity is strongly tied to birthplace. Country A37%22%27%49%Country BCountry CCountry DCountry E10% Construct a 99% confidence interval for the population proportion of adults who say national identity is strongly tied to birthplace for each country listed. Question content area bottom Part 1 The 99% confidence interval for the proportion of adults from Country A who say national identity is strongly tied to birthplace is (enter your response here ,enter your response here ). (Round to three decimal places as needed.)

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