(Answered) If the standard deviation of all pumps sigma is also

Statistics

If the standard deviation of all pumps σ is also unknown, compute a 95% confidence interval for μ if the average for randomly selected 20 heat pumps is 4.85 with s = 1.2.

Also, if the standard deviation of all pumps σ is unknown, is there an easier formula to estimate the sample size to control the width of the confidence interval? Please explain it.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91836909
Price:- $10

Verified Expert

Priced at $20 Now at $10, Verified Solution

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Amy wants to deposit money each year for the next five

Amy wants to deposit money each year for the next five years and each deposit to have $30,000 in real dollars currently and the inflation rate is 3% per year and the nominal interest rate is 9.18%. (Round off all answers ...

What does the real world evidence say about the law of one

What does the real world evidence say about the law of one price?

A process is normally distributed with a mean of 104

A process is normally distributed with a mean of 104 rotations per minute and a standard deviation of 8.2 rotations per minute. If a randomly selected minute has 118 rotations per minute, would the process be considered ...

A diamond can be classified as either gem qulaity or

A Diamond can be classified as either gem qulaity or industrial grade. Suppose that 92% of diamonds are classified as industrial grade. Would it be unusual if atleast one of five randomly selected diamonds is gem quality ...

A in how many ways can 5 men and women stand in a queue in

(a) In how many ways can 5 men and women stand in a queue in such a way that no two women stand together and no two men stand together? (b) A librarian wants to put 30 different books on 3 shelves, 10 books on each shelf ...

A manufacturing company wishes to compare two production

A manufacturing company wishes to compare two production facilities based on Defective units out of total unit production. The company obtains random samples from both facilities. Facility A produced a total of 983 units ...

Iformatics and financial applicationsbackgroundthe

Informatics and Financial Applications Background The assignment of a payroll calculator demonstrates Excels ability to automate and present financial calculation information clearly. The ability to build and professiona ...

On average the parts from a supplier have a mean of 975

On average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 12.2 inches. Find the probability that a randomly selected part from this supplier will have a value between 85.3 and 109.7 inc ...

Anbsphow much money would you have to invest today to

a. How much money would you have to invest today to accumulate ?$3,100 after 4 years if the rate of return on your investment is 15?%? b. What is the present value of ?$3,100 that you will receive after 4 years if ...

Do you have a credit card or use some other form of

Do you have a credit card or use some other form of consumer credit? Identify what you currently use, if any. If you do not use credit, discuss a type of credit that you might consider in the future. What advantages does ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert