# (Solved Homework): •Please determine the 95% confidence interval using the z-interval and the following information…

•Please determine the 95% confidence interval using the z-interval and the following information:

•Mean – 2.75

Don't use plagiarized sources. Get Your Custom Essay on
(Solved Homework): •Please determine the 95% confidence interval using the z-interval and the following information…
Get an essay WRITTEN FOR YOU, Plagiarism free, and by an EXPERT!

•StDev – .025

•Sample size – 35

•Assume the data is normal and please show your work by inserting the equations below or on a separate slide.

A 95% confidence interval covers 95% of the normal curve — the probability of observing a value outside of this area is less than 0.05. Because the normal curve is symmetric, half of the area is in the left tail of the curve, and the other half of the area is in the right tail of the curve. For a 95% confidence interval, the area in each tail is equal to 0.05/2 = 0.025.

The value z* representing the point on the standard normal density curve such that the probability of observing a value greater than z* is equal to p is known as the upper p critical value of the standard normal distribution. For example, if p = 0.025, the value z* such that P(Z > z*) = 0.025, or P(Z < z*) = 0.975, is equal to 1.96

Thus Z value corresponding to 95 % confidence interval = 1.96

Thus Range for 95% confidence interval

= m + /- Z x Sd/ Square root ( n)

m = Mean = 2.75

Sd = Standard deviation = 0.025

N = Sample size = 35

Z = 1.96

Therefore , Range for 95% confidence interval

= 2.75 + / – 1.96 x 0.025/Square root ( 35)

= 2.75 +/- 0.049 /5.916

= 2.75 +/- 0.0083

Thus 95 percent confidence interval = ( 2.7583 , 2.7417 )

Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

## Calculate the price of your order

Total price:
\$0.00

How it works?

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

## Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.