10. In a recent year, a survey was conducted to find out what proportion of first-vear collegstudents consider "being well-off financially" as an important goal. A college conducted itsown poll of 200 students and got that 132 of them considered this goal as important. Theywant to make a 98% confidence interval for the population proportion, p, of all 1st year studenteat the college who would consider 'being well off financially' as an important personal goal(a) Find p=X/n =%3Db) Find za =(c) Construct the 98% confidence interval for the population proportion, p:

Here, number of sample is 200 number of out of them 132. We will use one proportion z- confidence…

Answered: 10. In a recent year, a survey was…

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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If 4 samples from 4 populations are given, then what is the probability of getting at least one Type 1 error at 95% confidence interval and no Type 1 error? Pepsi Co. Pvt Ltd is planning to produce a new energy drink. For this purpose, a pilot study was conducted using four different energy drinks formula. They were tested on 3 different sets of people and the reactions in energy level of the people were measured forming four groups. Using the data (measured energy level values) provided below, test whether there is difference in the four energy drinks. The data is as shown in Table. Formula 1 Formula 2 Formula 3 Formula 4 64 46 23 38 65 42 32 25 70 52 45 37 Table
Of 575 broiler chickens purchased randomly from various kinds of food stores in different regions of a country and tested for types of bacteria that cause food-borne illnesses,16% were infected with a particular bacterium. a) What is a 95%confidence interval for the percentage of broiler chickens bought at food stores in the country that are infected with a particular bacterium? (Round to three decimal places as needed.) b) What is the margin of error at 95% confidence? (Round to three decimal places as needed.)
A scorlarship requires applicants to get a score at the 90th percentile or above on a certain standadized test in order to qualify. Angela gets a score of 177 out of 200 possible points on the test. Did Angela definitely qualify, definely not qualify, or is there not enough information to determine wheter or not she qualified? Explain.
A long-term study followed 128 women throughout their lifetime. Among thevarious data collected, one interesting result was that 32 of these women hadsuffered from a migraine at some point in their life.a) Use the results of this study and a 95% confidence interval to estimate thepercentage of women in the population that will suffer from a migraine intheir lifetime. Use symbols and words to express your answer.b) Use the results of this study to test the claim that the percentage(proportion) of women in the population that will suffer from a migraine isless than 33% in their lifetime. Use 0.05 significance level. Use symbolsand words to express your answer.
A nutrition and diet center selected 12 clients randomly and listed the weight they lost after the nutrition program in kg as follows. According to this, Number of clients Weight loss (kg) 3,2 2,1 4,6 1,8 1. 2 4 3,5 6. 2,2 1,9 7 8. 4,2 2,6 9. 10 1,7 11 4,3 12 5,2 1. Find and interpret the 95% confidence interval for the population mean. 2. If a confidence interval calculated for the population mean is found to be 2.62 - 3.59, find the confidence level of this range.
A research company has carried out a poll to find out about people’s economic outlook. 894 of 1854 young adults (aged between 20–29 years) said that the economic situation is likely to improve over the next year. By contrast, 1292 of 2243 mature adults (aged between 30–39 years) agreed with this statement.) Calculate the upper limit of an 80% confidence interval for the difference between the proportions of people holding this optimistic view in the two age groups in the population. Form the confidence interval around a positive point estimate for the difference between the proportions. In order to obtain a positive point estimate, make sure you subtract the lower value from the higher value when calculating the difference between the sample proportions. Provide your answer as a number between 0 and 1 rounded to 4 decimal places.
23) It is found that a 95% confidence interval for the mean score of all students on an aptitude test is (62, 70). It means that there is a 95% chance that the mean score of all students on an aptitude test is between 62 and 70. False True
Genetic studies have shown that 4% of Americans with European descent also have African ancestry. A random sample of DNA from 500 Americans has been chosen, calculate a 95% confidence interval for the proportion of Americans that with European descent who also have African ancestry. Genetic studies have shown that 4% of Americans with European descent also have African ancestry. A random sample of DNA from 500 Americans has been chosen, calculate a 95% confidence interval for the proportion of Americans that with European descent who also have African ancestry. (1.92%, 1.581%) (-0.23%, 1.826%) (2.282%, 5.718%) (1.742%, 6.257%)
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