# To estimate the average annual expenses of students

To estimate the average annual expenses of students.

Question 1

To estimate the average annual expenses of students on books and class materials a sample of size 36 is taken. The mean is \$850 and the standard deviation is \$54. A 99% confidence interval for the population mean is

Question 2

A random sample of 16 ATM transactions at the Last National Bank of Flatrock revealed a mean transaction time of 2.8 minutes with a standard deviation of 1.2 minutes. The width (in minutes) of the 95% confidence interval for the true mean transaction time is

Question 3

A financial institution wishes to estimate the mean balances owed by its credit card customers. The population standard deviation is estimated to be \$300. If a 99 percent confidence interval is used and an interval of ±\$75 is desired, how many cardholders should be sampled?

Question 4

Oxnard Beneficial Insurance wants to estimate the cost of damage to cars due to accidents. The standard deviation of the cost is estimated at \$200. They want to estimate the mean cost using a 95% confidence interval within ± \$10. What is the minimum sample size n?

Question 5

We could narrow a 95% confidence interval by

Question 6

Jolly Blue Giant Health Insurance (JBGHI) is concerned about rising lab test costs and would like to know what proportion of the positive lab tests for prostate cancer are actually proven correct through subsequent biopsy. JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size, to be conservative?

Question 7

If a normal population has parameters μ= 40 and σ= 8, then for a sample size n = 4

Question 8

The sample proportion lies within the confidence interval for the population proportion

Question 9

An airport traffic analyst wants to estimate the proportion of daily takeoffs by small business jets (as opposed to commercial passenger jets) with an error of ±4 percent with 90 percent confidence. What sample size should the analyst use?

Question 10

Use the conventional polling definition, find the margin of error for a customer satisfaction survey of 225 customers who have recently dined at Applebee’s.

.

To estimate the average annual expenses of students

Pages (275 words)
Standard price: \$0.00
Client Reviews
4.9
Sitejabber
4.6
Trustpilot
4.8
Our Guarantees
100% Confidentiality
All your data is secure and will never be disclosed to third parties. Your essay or assignment is treated as your intellectual property and can never be shared or provided as a sample to aspiring customers.
Original Writing
We complete all papers from scratch. You can get a plagiarism report.
Timely Delivery
You will never have to worry about deadlines – 98% of our assignments are completed on time.
Money Back
We give refunds anytime you feel the work did not meet your expectations. However, we have not refunded any papers in the last 6 months as our team keeps improving their quality and customer service.

## Calculate the price of your order

You will get a personal manager and a discount.
We'll send you the first draft for approval by at
Total price:
\$0.00
Power up Your Academic Success with the
Team of writers and tutors. We are here for you.
Power up Your Study Success with Experts We’ve Got Your Back.