Author Question: Explain what the difference between a parameter and a statistic is. Give an example of ... (Read 78 times)

faduma

  • Hero Member
  • *****
  • Posts: 528
Explain what the difference between a parameter and a statistic is. Give an example of each.

Question 2

Midterm Exam Results reported as z-scores. What percentile does Greg's score correspond to?



CharlieArnold

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

A parameter is a characteristic of a population; a statistic is a characteristic of a sample. An example of a parameter would be the proportion of all students who will vote for a particular candidate for student body president. An example of a statistic is the proportion of students in a sample who will vote for the candidate.

Answer to Question 2

By the empirical rule we could say 16 will be above 70 points. Thus a score of 70 points corresponds to the 84th percentile. Using a table or calculator to obtain the exact area to the left of a z = 1, we could report Greg's score as the 84.13th percentile.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

For a complete list of videos, visit our video library