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

Author Question: Suppose a department store wants to estimate the mean age of the customers of its contemporary ... (Read 96 times)

abc

  • Hero Member
  • *****
  • Posts: 543
on: Jun 24, 2018
Suppose a department store wants to estimate the mean age of the customers of its contemporary apparel department, correct to within 2 years, with level of confidence equal to 95. Management believes that the standard deviation is 8 years. The sample size they should take is ________.
 
  Fill in the blank(s) with correct word

Question 2

As an aid to the establishment of personnel requirements, the director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period. The director randomly selects 64 different 24-hour periods and determines the number of admissions for each. For this sample, = 396 and S = 100. Using the sample standard deviation as an estimate for the population standard deviation, what size sample should the director choose if she wishes to estimate the mean number of admissions per 24-hour period to within 1 admission with 99 reliability?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

BAOCHAU2803

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jun 24, 2018
Answer to Question 1

62

Answer to Question 2

n = 166
Note: The answer is computed using Z = 2.575 from Table E.2 or Z = 2.5758293 using PHStat.


abc

  • Member
  • Posts: 543
Reply 2 on: Jun 24, 2018
:D TYSM

mochi09

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

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

Acute exacerbations of asthma can require management in the emergency department. The child is place Acute exacerbations of asthma can require management in the emergency department. The child is place
Evolutionary ecologists live and do research in contemporary cultures that maintain all or some aspe Evolutionary ecologists live and do research in contemporary cultures that maintain all or some aspe
Wetlands Store and Clean Water Wetlands Store and Clean Water
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth
Video: Hip Animation

For a complete list of videos, visit our video library