This topic contains a solution. Click here to go to the answer

Author Question: Suppose a department store wants to estimate the mean age of the customers of its contemporary ... (Read 109 times)

abc

  • Hero Member
  • *****
  • Posts: 543
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
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
Excellent


alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
:D TYSM

 

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?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

For a complete list of videos, visit our video library