Question

In a class of 120 Geometry students, it was discovered that 36 students cheated. In another...

In a class of 120 Geometry students, it was discovered that 36 students cheated. In another class of 150 Algebra II students, it was discovered that 55 students cheated.

A. Find a 90% confidence interval for the difference in proportions of Geometry and Algebra II students that cheated.

B. If the algebra II teacher believes that that the proportion of her students hat cheated would be lower than the proportion of Geometry students that cheated, what would bet he null and alternative hypotheses.

C. What us the value of the z statistic for testing these hypotheses?

D. What is the p-value of your test?

E. What conclusions can you make based on the information?

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

Homework Answers

Answer #1

we are 90% confident that the true difference between population proportions is contained by the interval (−0.161,0.028).

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
For students who first enrolled in two year public institutions in a recent​ semester, the proportion...
For students who first enrolled in two year public institutions in a recent​ semester, the proportion who earned a​ bachelor's degree within six years was 0.394. The president of a certain college believes that the proportion of students who enroll in her institution have a higher completion rate. ​(a) Determine the null and alternative hypotheses. ​(b) Explain what it would mean to make a Type I error. ​(c) Explain what it would mean to make a Type II error.
Let's say you want to poll a random sample of 150 students on campus to see...
Let's say you want to poll a random sample of 150 students on campus to see if they prefer to take online classes. Of course, if you took an actual poll you would only get one number (your sample proportion, p-hat). Imagine all the possible samples of 150 students that you could draw and the distribution of all the possible sample proportions you would get from them. If I told you that we know that 35% of all students actually...
1- Students in the senior capstone course (N=36) at University Uptight took the Political Science subtest...
1- Students in the senior capstone course (N=36) at University Uptight took the Political Science subtest developed by the National Bored Testing Association. The test is a 75-item, multiple-choice test covering all areas of political science. The national norms for the test show a mean of 50. The mean for the students in the capstone was 55, with a standard deviation of 15. Did the students at UU score significantly higher than national norms? State your null and alternative hypotheses....
For students who first enrolled in two year public institutions in a recent semester, the proportion...
For students who first enrolled in two year public institutions in a recent semester, the proportion who earned a bachelor's degree within six years was 0.388. The president of the certain college believes that the portion of students who enrolled in her institution have a lower completion rate. (a) Determine the null and alternative hypotheses (b) Explain what it would mean to make a type I error. (c) Explain what it would mean to make a type II error.?
They have selected a class of 30 students to be taught according to this new method....
They have selected a class of 30 students to be taught according to this new method. At the end of the semester the average grade of these students was 78. Assume that the mean (µ) grade across all of the business analytics classes that do not utilize this new method is 72 with a standard deviation of 10. What would be the proper set of hypotheses? Using the p-value approach, what is p-value you would use? Based on this test,...
For students who first enrolled in two year public institutions in a recent​ semester, the proportion...
For students who first enrolled in two year public institutions in a recent​ semester, the proportion who earned a​ bachelor's degree within six years was 0.395. The president of a certain college believes that the proportion of students who enroll in her institution have a lower completion rate. ​(a) Determine the null and alternative hypotheses. ​(b) Explain what it would mean to make a Type I error. ​(c) Explain what it would mean to make a Type II error. ​(b)...
For students who first enrolled in two year public institutions in a recent​ semester, the proportion...
For students who first enrolled in two year public institutions in a recent​ semester, the proportion who earned a​ bachelor's degree within six years was 0.3960.396. The president of a certain college believes that the proportion of students who enroll in her institution have a higherhigher completion rate. ​(a) Determine the null and alternative hypotheses. ​(b) Explain what it would mean to make a Type I error. ​(c) Explain what it would mean to make a Type II error. ​(a)...
55% of students entering four-year colleges receive a degree within six years. Is this percent larger...
55% of students entering four-year colleges receive a degree within six years. Is this percent larger than for students who play intramural sports? 170 of the 299 students who played intramural sports received a degree within six years. What can be concluded at the level of significance of α = 0.05? a. For this study, we should use (t-test for a population mean, z-test for population proportion) b. The null and alternative hypotheses would be: Ho: ( p, μ) (...
Professor Meanie’s persistent rate (i.e. students who do not drop the course) is historically 65%. However,...
Professor Meanie’s persistent rate (i.e. students who do not drop the course) is historically 65%. However, this semester he decided to “flip” his classroom. Instead of coming to class for a typical lecture, students are expected to watch the lecture online the night before. The next day students will work in groups of three on exercises that reinforce concepts from the video lectures. He started with 120 students and 72 completed the course. Ideally, he is trying to increase the...
Read carefully through the following problems (Questions 5-8). Each problem is accompanied by a null and...
Read carefully through the following problems (Questions 5-8). Each problem is accompanied by a null and an alternative hypothesis, and each set of hypotheses includes at least one mistake. We would like you to identify what the mistake(s) is/are. A claim is made that adults spend an average of $475 per year on birthday presents. A researcher believes this value is too low, and she sets out to gather data to test this claim. Her null and alternative hypotheses are...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT