Question

According to a survey of 100 students in a certain university, 25 students are fans of...

According to a survey of 100 students in a certain university, 25 students are fans of Ravens. (a) Calculate a 95% confidence interval for the proportion of students that are fans of Ravens. (b) Interpret the interval you just found in part (a). (c) Assuming no any available information, how large a sample size is necessary if we want a 95% confidence interval with a width of 10%?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A survey of 200 students is selected randomly on a large university campus They are asked...
A survey of 200 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 70 of the 200 students use laptops to take notes in class. What is the value of the sample proportion? What is the standard error of the sampling proportion? Construct an approximate 95% confidence interval for the true proportion by going 2 standard errors from the sampling...
A survey of 200 students is selected randomly on a large university campus They are asked...
A survey of 200 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 70 of the 200 students use laptops to take notes in class. What is the value of the sample proportion? (0.5 pts) What is the standard error of the sampling proportion? (0.5 pts) Construct an approximate 95% confidence interval for the true proportion by going 2 standard...
A survey of 158 students is selected randomly on a large university campus. They are asked...
A survey of 158 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 79 of the 158 students responded​ "yes." An approximate 95​% confidence interval is ​(0.422, 0.578​). Complete parts a through d below. ​a) How would the confidence interval change if the confidence level had been 90% instead of 95%? b) How would the confidence interval change if the...
A survey of 180 students is selected randomly on a large university campus. They are asked...
A survey of 180 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 90 of the 180 students responded "yes". An approximate 98% confidence interval is (0.413, 0.587). Complete parts a through C. a) How would the confidence interval change if the confidence level has been 95% instead of 98% b) How would confidence interval change if the sample size...
A survey of 200 students is selected randomly on a large university campus. They are asked...
A survey of 200 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. Suppose that based on the​ survey, 120 of the 200 students responded​ "yes." ​a) What is the value of the sample proportion ModifyingAbove p with caret​? ​b) What is the standard error of the sample​ proportion? ​c) Construct an approximate 95​% confidence interval for the true proportion p by taking plus or minus 2...
7. A survey of 300 students is selected randomly on a large university campus. They are...
7. A survey of 300 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. Suppose that based on the ​survey, 120 of the 300 students responded​ "yes." ​a) What is the value of the sample proportion p (with the ^ on top of p)? ​b) What is the standard error of the sample​ proportion? c) ​c) Construct an approximate 95​% confidence interval for the true proportion p...
A survey of 375 students is selected randomly on a large university campus. They are asked...
A survey of 375 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 69 of the 375 students responded​ "yes." An approximate 95​% confidence interval is ​(0.380​, 0.540​).
A survey of 175 students is selected randomly on a large university campus. They are asked...
A survey of 175 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 119 of the 175 students responded​ "yes." An approximate 95​% confidence interval is ​(0.611​, 0.749​). 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 narrower. narrower. wider....
The Dean of Students at a large university wanted to estimate the proportion of students who...
The Dean of Students at a large university wanted to estimate the proportion of students who are willing to report cheating by fellow students. So, her staff surveyed 172 students currently enrolled in the introduction to biology class. The students were asked, “Imagine that you witness two students cheating on a quiz. Would you tell the professor?” 19 of the surveyed students responded “yes.” Using these data, calculate a 95% confidence interval for the proportion of all students at the...
A survey of n = 100 students from a large university revealed that 40 had some...
A survey of n = 100 students from a large university revealed that 40 had some fear of the dentist. At the confidence level α = 0.94, the margin of error in your estimate of the proportion who have a fear of dentists is: A: 0.101 B: 0.113 C: 0.086 D: 0.092 E: 0.081
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT