Suppose you want to know what percent of undergraduate students attending at the University of Nebraska...
Suppose you want to know what percent of undergraduate students attending at the University of Nebraska – Lincoln are from Nebraska. This indicates how UNL attracts students from other states and other part of the world. Can you come up with an estimate (as well as a 95% confidence interval) of the percent of undergraduate students attending at the University of Nebraska – Lincoln are from Nebraska? Describe your approach and results. Tips: you need to randomly sample a group of students and construct a confidence interval based on the sample. [2pt]
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Suppose you want to know what percent of undergraduate students
attending at the University of Nebraska...
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random...
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? We can be 95% confident that the sample mean weight of the 200 undergraduate male students in...
3 Suppose a university wishes to estimate the average weight of their undergraduate male students. A...
3
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? 95% of all male undergraduate students at this university weigh between 81.3 and 85.3 kilograms. In...
You would like to know what proportion of Canadian undergraduate university students check professor ratings before...
You would like to know what proportion of Canadian undergraduate university students check professor ratings before they register for courses. You survey students who are currently enrolled in undergraduate programs at 7 randomly selected Canadian universities and obtain information from 1778 students (254 students were randomly selected from each of the 7 universities you surveyed). What is the population in this study? O A. All students who are currently enrolled in an undergraduate program at a Canadian university. B. All...
An article in the San Jose Mercury News stated that students in the California state university...
An article in the San Jose Mercury News stated that students in the California state university system take 4.5 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 38 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level? A. What is the p-value? (Round your answer to four decimal places.) B....
We are interested in estimating the proportion of people that can identify Nebraska but not Vermont....
We are interested in estimating the proportion of people that can identify Nebraska but not Vermont. In a class of 55 students, each student was requested to select a sample of 6 people, show each person a map of the US and ask the person to identify the states of Vermont and Nebraska. The following numbers are the counts that each student got, that is, each number is the count of people in the student sample of 6, that could...
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...
1. The University of Canterbury wants information on whether full-time undergraduate students at Canterbury use certain...
1. The University of Canterbury wants information on whether full-time undergraduate students at Canterbury use certain facilities (e.g. gym, library). (a) Define the target population in terms of how it differs from the general population. (b) The proposed method to collect the data is to place students at three places on campus and ask everyone passing by to fill in the questionnaire. It is intended to do this between 12 and 1pm on the Monday to Friday of the last...
You have been given the task of finding out what proportion of students that enroll in...
You have been given the task of finding out what proportion of students that enroll in a local university actually complete their degree. You have access to first year enrolment records and you decide to randomly sample 110 of those records. You find that 89 of those sampled went on to complete their degree. a) Calculate the proportion of sampled students that complete their degree. Give your answer as a decimal to 3 decimal places. Sample proportion = You decide...
A random sample of 75 students at the University of Minnesota spend an average of $614...
A random sample of 75 students at the University of Minnesota spend an average of $614 per month in rent with a standard deviation of $219. The distribution is moderately skewed to the high end. Which of the following statements are true? i. 95% of students at the university spend $564 to $664 on rent. ii. We are 95% confident that the average rent for students at the university is between $564 and $664. iii. Because we cannot examine other...
University X has 25,000 students. You want to determine, within ±1000 and with 95% confidence, how...
University X has 25,000 students. You want to determine, within ±1000 and with 95% confidence, how many of these 25,000 students purchased books online during 2012. From your experience with other colleges, you know that about 20% of students purchase books online. What sample size do you need? N = Z=2 = NE = E =
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? We can be 95% confident that the sample mean weight of the 200 undergraduate male students in...
3
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? 95% of all male undergraduate students at this university weigh between 81.3 and 85.3 kilograms. In...
You would like to know what proportion of Canadian undergraduate university students check professor ratings before they register for courses. You survey students who are currently enrolled in undergraduate programs at 7 randomly selected Canadian universities and obtain information from 1778 students (254 students were randomly selected from each of the 7 universities you surveyed). What is the population in this study? O A. All students who are currently enrolled in an undergraduate program at a Canadian university. B. All...
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...
You have been given the task of finding out what proportion of students that enroll in a local university actually complete their degree. You have access to first year enrolment records and you decide to randomly sample 110 of those records. You find that 89 of those sampled went on to complete their degree. a) Calculate the proportion of sampled students that complete their degree. Give your answer as a decimal to 3 decimal places. Sample proportion = You decide...
A random sample of 75 students at the University of Minnesota spend an average of $614 per month in rent with a standard deviation of $219. The distribution is moderately skewed to the high end. Which of the following statements are true? i. 95% of students at the university spend $564 to $664 on rent. ii. We are 95% confident that the average rent for students at the university is between $564 and $664. iii. Because we cannot examine other...
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