This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A local bank has determined that the daily balances of the checking accounts of its customers are ... (Read 186 times)

ETearle

  • Hero Member
  • *****
  • Posts: 580
on: Jun 24, 2018
A local bank has determined that the daily balances of the checking accounts of its customers are normally distributed with an average of 280 and a standard deviation of 20.
 a. What percentage of its customers has daily balances of more than 275?
  b. What percentage of its customers has daily balances less than 243?
  c. What percentage of its customers' balances is between 241 and 301.60?

Question 2

The proprietor of a boutique in New York wanted to determine the average age of his customers. A random sample of 25 customers revealed an average age of 28 years with a standard deviation of 10 years. Determine a 95 confidence interval estimate for the average age of all his customers. Assume the population of customer ages is normally distributed.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Harbringer

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 59.87
b. 3.22
c. 83.43

Answer to Question 2

23.872 to 32.128


ETearle

  • Member
  • Posts: 580
Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it

alvinum

  • Member
  • Posts: 317
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Checking teeth and other physical examinations are an important part of horse care. Checking teeth and other physical examinations are an important part of horse care.
A Recently Discovered Member of the Local Group A Recently Discovered Member of the Local Group
Sample Program for Changing Daily Caloric Intake Sample Program for Changing Daily Caloric Intake
Example of Reconciling a Bank Statement Example of Reconciling a Bank Statement
The position of the fetus is first determined by ultrasound The position of the fetus is first determined by ultrasound
Separation of Powers and Checks and Balances Separation of Powers and Checks and Balances
Video: ribosome

For a complete list of videos, visit our video library