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9. Some teachers and students are interested in estimating the proportion p of infected geese with...
The Dean of engineering is interested in estimating the proportion of incoming students at her university...
The Dean of engineering is interested in estimating the proportion of incoming students at her university that plan to study engineering. During the university’s orientation, the office staff managed to survey 120 students during the lunch break. Of those surveyed, 25 students said they were interested in studying engineering. Compute a 95% confidence interval that estimates the proportion of incoming students that plan to study engineering. Using the information provided, what sample size would be needed for the width of...
A business student is interested in estimating the 95% confidence interval for the proportion of students...
A business student is interested in estimating the 95% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the sample proportion within six percentage points of the population proportion. What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available? Use Table 1. (Round intermediate calculations to 4 decimal places and...
A lecturer is interested in estimating the proportion of students who fail quantitative methods exams. In...
A lecturer is interested in estimating the proportion of students who fail quantitative methods exams. In a random sample of 120 students who sat for a quantitative methods exam in a certain year 24 failed. (a) Compute a 90% confidence interval for the proportion of students who fail quantitative methods. 2 (b) Is there sufficient evidence to indicate that the proportion of students who fail quantitative methods is higher than 0.15? Test at the 5% level of significance. (c) Can...
6. We want to determine the sample size for estimating the population proportion p that would...
6. We want to determine the sample size for estimating the population proportion p that would vote for candidate A with a 95% confidence interval and a margin of error of no greater than 2 %. What is the sample size given that we have no fore knowledge so that p should be a value of 0.5 or 50%?
Constructing Confidence Intervals, Part 1: Estimating Proportion Assume that a sample is used to estimate a...
Constructing Confidence Intervals, Part 1: Estimating Proportion
Assume that a sample is used to estimate a population proportion p.
Find the margin of error E that corresponds to the given statistics
and confidence level: In a random sample of 200 college students,
110 had part-time jobs. Find the margin of error for the 98%
confidence interval used to estimate, for the entire population of
college students, the percentage who have part-time jobs. Round
your answer to three decimal places.
Please...
A school administrator is interested in estimating the proportion of students in the district who participate...
A school administrator is interested in estimating the proportion of students in the district who participate in community service activities. From a random sample of 100 students in the district, the administrator will construct a 99 percent confidence interval for the proportion of all district students who participate in community service activities. Which of the following statements must be true? A)The population proportion will be in the confidence interval. b)The probability that the confidence interval will include the population proportion...
In a study of government financial aid for college students, researchers needed to estimate the proportion...
In a study of government financial aid for college students, researchers needed to estimate the proportion of full-time college students who earn a bachelor's degree in 4 years or less. Assuming a confidence level of 90%, find the sample size needed to estimate that proportion with a 0.03 margin of error in two cases: (1) no assumptions are made about the value of the sample proportion, and (2) prior studies have shown that roughly 60% of full-time students earn a...
3. Fill in the blanks (show your work by drawing or using certain formula). a) (2...
3. Fill in the blanks (show your work by drawing or using certain formula). a) (2 points) To form a 96% confidence interval for population proportion, 2.4 b) (2 points) To form a 98% confidence interval for population mean using a sample size of 26, to c) (2 points) For a 99% confidence interval with margin of error 0.03 with a prior estimate 0.65 of the sample proportion p in estimating population proportion p, we need to have sample size...
You are interested in estimating the proportion of students at OSU who plan to study abroad. ...
You are interested in estimating the proportion of students at OSU who plan to study abroad. You construct a 95% confidence interval based on a survey of a random sample of 125 students, and the interval ends up being from 0.109 to 0.243. If you had instead constructed a 99% confidence interval based on the same sample of data, rather than a 95% confidence interval, how would the center of the interval change? A More information is needed in order...
One researcher is interested in estimating the proportion of deaths due to stomach cancer in relation...
One researcher is interested in estimating the proportion of deaths due to stomach cancer in relation to the number of deaths from any type of neoplasia. His experience tells him that it would be surprising if that proportion exceeds the value of 1/3. What size of sample should you take to estimate the previous ratio, with a confidence of 99%, so that the estimated value does not differ from the real value by more than 0.03?
6. We want to determine the sample size for estimating the population proportion p that would vote for candidate A with a 95% confidence interval and a margin of error of no greater than 2 %. What is the sample size given that we have no fore knowledge so that p should be a value of 0.5 or 50%?
Constructing Confidence Intervals, Part 1: Estimating Proportion
Assume that a sample is used to estimate a population proportion p.
Find the margin of error E that corresponds to the given statistics
and confidence level: In a random sample of 200 college students,
110 had part-time jobs. Find the margin of error for the 98%
confidence interval used to estimate, for the entire population of
college students, the percentage who have part-time jobs. Round
your answer to three decimal places.
Please...
3. Fill in the blanks (show your work by drawing or using certain formula). a) (2 points) To form a 96% confidence interval for population proportion, 2.4 b) (2 points) To form a 98% confidence interval for population mean using a sample size of 26, to c) (2 points) For a 99% confidence interval with margin of error 0.03 with a prior estimate 0.65 of the sample proportion p in estimating population proportion p, we need to have sample size...
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