Question

3. The University of Chicago conducted a study to see how many students attended a women’s...

3. The University of Chicago conducted a study to see how many students attended a women’s softball game last season. There are 14,400 students attending NC State University, and the study showed that 450 of 900 students sampled attended a women’s soccer game. What inferences can be made about student attendance at women’s softball games? (a) What is the estimated proportion for the population? (b) Using the 95% level of confidence, what is the confidence interval? (c) Using the 99% level of confidence, what is the confidence interval?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #2

a)

Estimated proportion = 450 / 900 = 0.50

b)

95% confidence interval for p is

- Z * Sqrt( ( 1 - ) / n) < p < + Z * Sqrt( ( 1 - ) / n)

0.5 - 1.96 * sqrt( 0.5 * 0.5 / 900) < p < 0.5 + 1.96 * sqrt( 0.5 * 0.5 / 900)

0.467 < p < 0.533

95% confidence interval is ( 0.467 , 0.533)

c)

The 99% confidence interval for p is

- Z * Sqrt( ( 1 - ) / n) < p < + Z * Sqrt( ( 1 - ) / n)

0.5 - 2.576 * sqrt( 0.5 * 0.5 / 900) < p < 0.5 + 2.576 * sqrt( 0.5 * 0.5 / 900)

0.457 < p < 0.543

99% confidence interval is ( 0.457 , 0.543 )

answered by: anonymous
0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1.A survey of households in a small town showed that in 850 of 1,200 sampled households,...
1.A survey of households in a small town showed that in 850 of 1,200 sampled households, at least one member attended a town meeting during the year. Using the 99% level of confidence, what is the confidence interval for the proportion of households represented at a town meeting? 2.A survey of an urban university (population of 25,450) showed that 750 of 1,100 students sampled attended a home football game during the season. Using the 99% level of confidence, what is...
a.) A study of class attendance and grades among first-year students at a state university showed...
a.) A study of class attendance and grades among first-year students at a state university showed that in general students who attended a higher percent of their classes earned higher grades. Class attendance explained r2 = 64% of the variation in grade index among the students. What is the numerical value of the correlation between percent of classes attended and grade index? (Use 2 decimal places.) b.) An opinion pollster asks 100 college seniors how they view their job prospects....
A survey of an urban university showed that 850 of 1,000 students sampled supported a fee...
A survey of an urban university showed that 850 of 1,000 students sampled supported a fee increase to fund improvements to the student recreation center. a. What is the point estimate for the proportion of students who supported the fee increase? b. Using the 0.90 level of confidence, construct the confidence interval for the population proportion. c. If university officials say that at least 85% of the voting student population need to support the fee increase (to be applied), what...
A student organization wondered how many hours per week college students study during a term. The...
A student organization wondered how many hours per week college students study during a term. The organization obtained a list of all students at their university and randomly selected 100 from the list. They contacted all 100 students and all 100 provided their best estimate of the number of hours they typically study per week. A​ 95% confidence interval for the mean number of hours studied per week was constructed. Based on this​ study, to what population can we make...
A recent University of Chicago research project surprised many young adults when it was reported that...
A recent University of Chicago research project surprised many young adults when it was reported that older Americans (ages 50-75) continue to have active sex lives. Specifically, it was found that respondents are having sex 2.4 times per week, on average, and deviated from that mean by 0.87. The study was based on interviews with a random sample of 500 older Americans. What is the margin of error (remember, this is the value that we add to and subtract from...
Two researchers conducted a study in which two groups of students were asked to answer 42...
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a​ professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 22.9 with a standard deviation...
Two researchers conducted a study in which two groups of students were asked to answer 42...
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a​ professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 22.3 with a standard deviation...
Two researchers conducted a study in which two groups of students were asked to answer 42...
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a​ professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 26.3 with a standard deviation...
Two researchers conducted a study in which two groups of students were asked to answer 42...
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a​ professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 22.3 with a standard deviation...
Two researchers conducted a study in which two groups of students were asked to answer 42...
Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a​ professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 22.8 with a standard deviation...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT