Question

1. A statistician studies the average annual salary of professors in a local college in Florida....

1. A statistician studies the average annual salary of professors in a local college in Florida. Based on a random sample of 33 professors in this college, we found the mean salary is 52,000, and standard deviation is 6,400. Construct a 99% confidence interval for the population’s mean annual salary.

Based on another random sample of size 28, we found the mean salary is 54,500, and if we know the standard deviation of all professors in that college is 7,200. Construct a 84% confidence interval for the population’s mean annual salary. State the confidence statement.

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

Homework Answers

Answer #1

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 statistician studies the average annual salary of professors in a local college in Florida....
1. A statistician studies the average annual salary of professors in a local college in Florida. <a> Based on a random sample of 33 professors in this college, we found the mean salary is 52,000, and standard deviation is 6,400. Construct a 99% confidence interval for the population’s mean annual salary. <b> Based on another random sample of size 28, we found the mean salary is 54,500, and if we know the standard deviation of all professors in that college...
A study was made to estimate the difference in salaries of college professors in the private...
A study was made to estimate the difference in salaries of college professors in the private and state college of Virginia. A random sample of 100 professors in private colleges showed an average 9 months salary of 25050.55 with a standard deviation of 1098.62. A random sample of 200 professors in state colleges showed an average salary of 26006.71 with a standard deviation of 1362.17. Construct a 90% confidence interval for the ratio of two variances. Answer should be written...
A budding statistician wants to determine the average number of songs college students have on their...
A budding statistician wants to determine the average number of songs college students have on their playlist. They take a random sample of 26 students at their university and find the sample mean is 348 songs with a sample standard deviation of 22 songs. a. Find a 90% confidence interval for the mean number of songs college students have on their playlist. b. Interpret the confidence interval you found in part a. c. State the assumptions needed for your confidence...
A budding statistician wants to determine the average number of songs college students have on their...
A budding statistician wants to determine the average number of songs college students have on their playlist. They take a random sample of 26 students at their university and find the sample mean is 348 songs with a sample standard deviation of 22 songs. a. Find a 90% confidence interval for the mean number of songs college students have on their playlist. b. Interpret the confidence interval you found in part a. c. State the assumptions needed for your confidence...
2. A random sample of 12 recent college graduates reported an average starting salary of $54,000...
2. A random sample of 12 recent college graduates reported an average starting salary of $54,000 with a standard deviation of $6,000. To construct a 95% confidence interval for the mean starting salary of college graduates, what will be the margin of error? Round to whole dollars.
6. A random sample of 80 federal government workers found that the average annual salary for...
6. A random sample of 80 federal government workers found that the average annual salary for federal government employees in Iowa was $51,340 during 2019. Assuming the population standard deviation was σ = $5000 and that we want to use a 99% confidence interval to answer the following questions. (a) What is the margin of error? (b) What is the confidence interval for the average annual salary for federal employees? Question 1 margin of error Question 2 confidence interval for...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 18 colleges and universities in Kansas showed that x has a sample variance s2 = 78.4. Use a 5% level of significance to test the claim that the variance for colleges and universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 19 colleges and universities in Kansas showed that x has a sample variance s2 = 77.0. Use a 5% level of significance to test the claim that the variance for colleges and universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 20 colleges and universities in Kansas showed that x has a sample variance s2 = 84.0. Use a 5% level of significance to test the claim that the variance for colleges and universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 19 colleges and universities in Kansas showed that x has a sample variance s2 = 77.0. Use a 5% level of significance to test the claim that the variance for colleges and universities in Kansas is...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT