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

Author Question: A group of medical researchers is interested in knowing the mean cholesterol level for all men in ... (Read 63 times)

s.tung

  • Hero Member
  • *****
  • Posts: 577
on: Jul 25, 2018
A group of medical researchers is interested in knowing the mean cholesterol level for all men in the U.S. aged between 70 and 80. They pick a sample of 5,000 men and measure their cholesterol levels.
 
  They then calculate the mean and standard deviation of these cholesterol levels. Do the mean and standard deviation obtained in this way represent parameters or statistics? Why? What symbols could you use to denote the mean and standard deviation of the 5,000 cholesterol levels?

Question 2

Explain in your own words the difference between a parameter and a statistic. Give examples of two statistics and two parameters.
 
  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

joanwhite

  • Sr. Member
  • ****
  • Posts: 308
Reply #1 on: Jul 25, 2018
Answer to Question 1

The mean and standard deviation represent statistics since they are descriptive measures for a sample. They are denoted by and s, respectively.

Answer to Question 2

A parameter is a descriptive measure for a population while a statistic is a descriptive measure for a sample. ,  and N are parameters whereas , s and n are statistics.


s.tung

  • Member
  • Posts: 577
Reply 2 on: Jul 25, 2018
Gracias!

bimper21

  • Member
  • Posts: 309
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

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

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Elk pellet group Elk pellet group
shelducks, genus Tadorna, are a group of large birds in the Tadorninae subfamily of the Anatidae shelducks, genus Tadorna, are a group of large birds in the Tadorninae subfamily of the Anatidae
The planar peptide group The planar peptide group
Adults in the middle-aged group (37–42 years) score higher on measures of generativity than either ... Adults in the middle-aged group (37–42 years) score higher on measures of generativity than either ...
Sea-Level Pressure Sea-Level Pressure
Group of Gorillas Group of Gorillas
Video: Introduction to Genetics

For a complete list of videos, visit our video library