# Jim Wilson is the office manag

Jim Wilson is the office manager for a large manufacturing firm.His team is studying the usage of the company’s copy machines. Arandom sample of ten copy machines revealed the following number ofcopies from each machine (reported in 1,000s):

 1026 920 1193 968 986 973 1073 1229 965 1185

Jim believes that the actual mean usage of all the copy machinesis well over a million copies. Develop a 95% confidence intervalfor the mean number of copies per machine. (10 pts.) it can beoperating in excel.

Solution:

Confidence interval for Population mean is given as below:

Confidence interval = Xbar ± t*S/sqrt(n)

From given data, we have

Xbar = 1051.8

S = 111.8836697

n = 10

df = n – 1 = 10 – 1 = 9

Confidence level = 95%

Critical t value = 2.2622

(by using t-table or excel)

Confidence interval = Xbar ± t*S/sqrt(n)

Confidence interval = 1051.8 ± 2.2622*111.8836697/sqrt(10)

Confidence interval = 1051.8 ± 2.2622*35.38072294

Confidence interval = 1051.8 ± 80.0368

Lower limit = 1051.8 – 80.0368 = 971.76

Upper limit = 1051.8 + 80.0368 = 1131.84

Confidence interval = (971.76, 1131.84)

We are 95% confident that the average number of copies from allcopy machines will lies between 971.76 thousands and 1131.84thousands.

We are 95% confident that the average number of copies from allcopy machines will lies between 971763.2 and 1131837.

The number of one million lies within above confidence interval,so Jim’s belief is true about the usage of copy machines.

##### "Our Prices Start at \$11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!"
Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with brilliantassignmenthelp.com
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend
Use a coupon FIRST15 and enjoy expert help with any task at the most affordable price.
Claim my 15% OFF Order in Chat