A university is interested in the failure rates for a math course. They learned 42 students...
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university is interested in the failure rates for a math course.
They learned 42 students...
A large university is interested in the outcome of a course standardization process. They have taken a random sample of 100 student grades, across all instructors. The grades represent the proportion of problems answered correctly on a midterm exam. The s
A large university is interested in the outcome of a course standardization process. They have taken a random sample of 100 student grades, across all instructors. The grades represent the proportion of problems answered correctly on a midterm exam. The sample proportion correct was calculated as 0.78.Construct a 90% confidence interval on the population proportion of correctly answered problems.Construct a 95% confidence interval on the population proportion of correctly answered problems.
a)A university planner wants to determine the proportion of spring semester students who will attend summer...
a)A university planner wants to determine the proportion of spring semester students who will attend summer school. Suppose the university would like a 0.90 probability that the sample proportion is within 0.195 or less of the population proportion.What is the smallest sample size to meet the required precision? (There is no estimation for the sample proportion.) (Enter an integer number.) b)A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 31 current...
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...
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 University is interested in discovering what proportion of students are satisfied with the online delivery...
A University is interested in discovering what proportion of students are satisfied with the online delivery of modules. A total of 500 students were randomly selected from the academic administration register. Of these, 328 responded with 262 saying that they are satisfied with the online delivery. Produce a 95% confidence interval for the proportion of students who are satisfied.
The student affairs office of a public university wishes to study absenteeism among students at the...
The student affairs office of a public university wishes to study absenteeism among students at the School of Business during the semester. A random sample of 100 business students reveals the following: •Absenteeism: mean = 9.7 classes & standard deviation = 8.0 classes •48 business studentswere absent more than 5 classes a.Construct a 95% confidence interval estimate of the population mean number of absences for business students during the semester. b.Construct a 90% confidence interval estimate of the population proportion...
A survey of 300 students is selected randomly on a large university campus. They are asked...
A survey of 300 students is selected randomly on a large university campus. They are asked if they usea laptop in class to take notes. Suppose that based on the survey, 135 of the 300 students responded "yes." a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking 2 SEs from the sample proportion. a) p...
Suppose that 37% of ONU students have taken an online course. A random sample of...
Suppose that 37% of ONU students have taken an online course. A random sample of 200 ONU students is taken, of which 78 have taken an online course. What is the probability of obtaining a sample proportion this high or higher? There is some thought that the proportion taking online courses is no longer 37%. Based on the random sample, construct a 95% confidence interval for the proportion of ONU students who have taken an online course. ...
A university dean is interested in determining the proportion of students who receive some sort of...
A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 225 students and finds that 135 of them are receiving financial aid. Use a 90% confidence interval to estimate the true proportion of students who receive financial aid.
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...
A survey of 300 students is selected randomly on a large university campus. They are asked if they usea laptop in class to take notes. Suppose that based on the survey, 135 of the 300 students responded "yes." a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking 2 SEs from the sample proportion. a) p...
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