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

Author Question: The monthly income of residents of Daisy City is normally distributed with a mean of 3,000 and a ... (Read 117 times)

tfester

  • Hero Member
  • *****
  • Posts: 534
on: Jun 24, 2018
The monthly income of residents of Daisy City is normally distributed with a mean of 3,000 and a standard deviation of 500.
 a. Define the random variable in words.
  b. The mayor of Daisy City makes 2,250 a month. What percentage of Daisy City's residents has incomes that are more than the mayor's?
 c. Individuals with incomes of less than 1,985 per month are exempt from city taxes. What percentage of residents is exempt from city taxes?
 d. What are the minimum and maximum incomes of the middle 95 of the residents?
  e. Two hundred residents have incomes of at least 4,440 per month. What is the population of Daisy City?

Question 2

A sample of 25 patients in a doctor's office showed that they had to wait an average of 35 minutes with a standard deviation of 10 minutes before they could see the doctor. Provide a 98 confidence interval estimate for the average waiting time of all the patients who visit this doctor. Assume the population of waiting times 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

HandsomeMarc

  • Sr. Member
  • ****
  • Posts: 360
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. monthly income of residents of Daisy City
b. 93.32
c. 2.12
d. minimum = 2,020; maximum = 3,980
e. 100,000

Answer to Question 2

30.016 to 39.984


tfester

  • Member
  • Posts: 534
Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

AISCAMPING

  • Member
  • Posts: 347
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

People about to have surgery must tell their health care providers about all supplements they take.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Sociologists use income, education, and occupational prestige to measure social class. For most ... Sociologists use income, education, and occupational prestige to measure social class. For most ...
Household Income in the United States by Quintiles, 2009 Household Income in the United States by Quintiles, 2009
Income Inequality in the United States: 1947–2009 Income Inequality in the United States: 1947–2009
Variable and absorption costing, explaining operating-income differences. Variable and absorption costing, explaining operating-income differences.
Homozygous Markers Among Tristan Residents Homozygous Markers Among Tristan Residents
The price of rice in a small country is currently $6 per pound. In order to help low-income ... The price of rice in a small country is currently $6 per pound. In order to help low-income ...
Video: Introduction to Diabetes

For a complete list of videos, visit our video library