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 161 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
YES! Correct, THANKS for helping me on my review

kusterl

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

The More Things Change, The More They Say the Same: Dividing the Nation's Income The More Things Change, The More They Say the Same: Dividing the Nation's Income
Members of the British Punitive Expedition to Benin City Members of the British Punitive Expedition to Benin City
Relationship Between Income per Capita and Population Growth Relationship Between Income per Capita and Population Growth
Infant mortality by income quintile, urban Canada, 1996 Infant mortality by income quintile, urban Canada, 1996
Calculate the accumulated value of monthly payments of $100.00 made at the end of each month ... Calculate the accumulated value of monthly payments of $100.00 made at the end of each month ...
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: Transcription - Introns and exons

For a complete list of videos, visit our video library