A survey of 154 students is selected randomly on a large university campus. They are asked...
A survey of 154 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 77 of the 154 students responded "yes." An approximate 98% confidence interval is (0.406, 0.594). Complete parts a through d below. a) How would the confidence interval change if the confidence level had been 90% instead of 98%? The new confidence interval would be ▼ wider. narrower. The new confidence interval would be left parenthesis nothing comma nothing right parenthesis .
Homework Answers
a) The new confidence interval would be narrower
The new confidence interval 90% would be 0.434 , 0.566
( please revert if there are other parts of this)
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A survey of 154 students is selected randomly on a large
university campus. They are asked...
A survey of 160 students is selected randomly on a large university campus. is that 96...
A survey of 160 students is selected randomly on a large university campus. is that 96 of the 160 students responded An approximate 95% confidence interval is 0 524 0 676 They are asked if they use a laptop in class to take notes The result of the surve es Complete parts a through d below. a) How would the confidence interval change if the confidence level had been 90% instead of 95%? The new contidence interval would be narrower....
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...
dh A survey of 160 students is selected randomly on a large university campus. They are...
dh A survey of 160 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 80 of the 160 students responded "yes." An apprornate 95% confidence interval is (0 423, 0.577). Complete parts a through d below. a) How would the confidence interval change if the confidence level had been 90% instead of 95%? The new confidence interval would be (Round...
In a survey on downloading music, a poll asked 724 internet users if they "ever downloaded...
In a survey on downloading music, a poll asked 724 internet users if they "ever downloaded music from an Internet site that was not authorized by a record company, or not," and 23% responded "yes." Construct a 90% confidence interval for the true proportion of internet users who have downloaded music from an Internet site that was not authorized. What is the confidence interval? Select the correct choice below and, if necessary, fill in the answer boxes within your choice....
In a survey of 385 students at Broward College, North Campus, results revealed that 154 students...
In a survey of 385 students at Broward College, North Campus, results revealed that 154 students were born outside of the USA. Construct a 96% confidence interval estimate for the proportion of students who were born outside the USA. Show your calculations on a separate sheet of paper for p-hat. Q-hat, the margin of error and the construction of the confidence interval. Also, give your interpretation of the confidence interval estimate. SHOW WORK
5 pts university emalled a survey to 500 randomly In a study focused on determining student opinion about parking on campus, study fund thatS% were satished with the parking on chosen students. O...
5 pts university emalled a survey to 500 randomly In a study focused on determining student opinion about parking on campus, study fund thatS% were satished with the parking on chosen students. Of these 500, 20% responded within this 20%, the population of interest for this survey. had returned 1. ooo Identify the population of interest for this survey the survey, would you expect nearly 15% of the 500 to be satisfied with, parkin If all of the 500 students...
A survey of an urban university showed that 22% of 2800 randomly selected students supported a...
A survey of an urban university showed that 22% of 2800 randomly selected students supported a fee increase to fund improvements to the student recreation center. What is the 90% confidence interval estimate for the proportion of all students at this university in favor of the fee increase? (Round to the nearest tenth of a percent.) A.19.0%< p <25.0% B.20.7%< p <23.3% C.21.1%< p <22.9% D.20.1%< p <23.9% E.None of the above
2500 randomly selected Ryerson students were asked to fill out a survey on whether they exercise...
2500 randomly selected Ryerson students were asked to fill out a survey on whether they exercise regularly. 2000 students gave a positive answer. a) Calculate a 95% two-sided confidence interval on the proportion of students who regularly exercise. b) Indicate how the length of confidence interval changes if we increase the level of confidence and keep other values constant? Justify your answer.
A college campus wide survey indicates that 85% of the University Park 4th year undergraduate students...
A college campus wide survey indicates that 85% of the University Park 4th year undergraduate students live within a 3-mile radius of the campus. 1.) You are working with the campus survey team, and learn that there was a low response rate. In order to ensure the accuracy of that survey result, how many surveys would you need to collect in total in order to obtain a margin of error of +/- 3% with 98.122% confidence?
The grade point averages (GPA) for 1212 randomly selected college students are shown on the right....
The grade point averages (GPA) for 1212 randomly selected college students are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 2.52.5 3.33.3 2.92.9 1.91.9 0.80.8 4.04.0 2.42.4 1.41.4 3.73.7 0.40.4 2.12.1 3.43.4 (a) Find the sample mean. x overbarxequals=nothing (Round to two decimal places as needed.) (b) Find the sample standard deviation. sequals=nothing (Round to two decimal places as needed.)(c) Construct a 9999% confidence interval for the population mean muμ. A 9999%...
A survey of 160 students is selected randomly on a large university campus. is that 96 of the 160 students responded An approximate 95% confidence interval is 0 524 0 676 They are asked if they use a laptop in class to take notes The result of the surve es Complete parts a through d below. a) How would the confidence interval change if the confidence level had been 90% instead of 95%? The new contidence interval would be narrower....
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...
dh A survey of 160 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 80 of the 160 students responded "yes." An apprornate 95% confidence interval is (0 423, 0.577). Complete parts a through d below. a) How would the confidence interval change if the confidence level had been 90% instead of 95%? The new confidence interval would be (Round...
5 pts university emalled a survey to 500 randomly In a study focused on determining student opinion about parking on campus, study fund thatS% were satished with the parking on chosen students. Of these 500, 20% responded within this 20%, the population of interest for this survey. had returned 1. ooo Identify the population of interest for this survey the survey, would you expect nearly 15% of the 500 to be satisfied with, parkin If all of the 500 students...
2500 randomly selected Ryerson students were asked to fill out a survey on whether they exercise regularly. 2000 students gave a positive answer. a) Calculate a 95% two-sided confidence interval on the proportion of students who regularly exercise. b) Indicate how the length of confidence interval changes if we increase the level of confidence and keep other values constant? Justify your answer.
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