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 107 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
YES! Correct, THANKS for helping me on my review

Liddy

  • Member
  • Posts: 342
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Structure of cholesterol and steroid hormones derived from cholesterol Structure of cholesterol and steroid hormones derived from cholesterol
Members of the Lemba ethnic group from southern Africa. Members of the Lemba ethnic group from southern Africa.
In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han In one-male group species, extra males typically reside in all-male “bachelor” groups. These are Han
This illustration shows the decibel level in various locations and associated with different ... This illustration shows the decibel level in various locations and associated with different ...
The fuel level must be above 15% and below 85% before the EVAP monitor will run on most vehicles. The fuel level must be above 15% and below 85% before the EVAP monitor will run on most vehicles.
Video: Glycolysis - and oxygen

For a complete list of videos, visit our video library