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

Author Question: Suppose you have a herd of 100 cows and you need to select a simple random sample of 5 cows to test ... (Read 119 times)

burton19126

  • Hero Member
  • *****
  • Posts: 532
on: Jul 24, 2018
Suppose you have a herd of 100 cows and you need to select a simple random sample of 5 cows to test for a certain disease. You call the cows in for the evening, and pick the 5 that arrive first. Is this a simple random sample? Why or why not?

Question 2

Suppose you want to find out what percentage of students at your university would pay extra fees for the use of a new recreation center, and you want a simple random sample of 100 students. Suppose you go to the current recreation center and ask every 10th student who comes in the door to participate in your survey, until you have 100 people. Does this method of sampling give you a simple random sample? Explain your answer.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

macybarnes

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jul 24, 2018
Answer to Question 1

NO. THERE IS BIAS TOWARDS ANIMALS THAT ARE POSSIBLY HEALTHIER, MORE AGILE, OR YOUNGER, ETC; NOT EVERY SUBSET OF 5 ANIMALS HAD AN EQUAL CHANCE OF BEING THE CHOSEN SAMPLE.

Answer to Question 2

NO. ONLY THOSE WHO ATTENDED THE REC CENTER THAT DAY WILL HAVE ANY CHANCE OF BEING INCLUDED IN THE SAMPLE.


burton19126

  • Member
  • Posts: 532
Reply 2 on: Jul 24, 2018
:D TYSM

chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

A Simple Neural Model of Classical Conditioning A Simple Neural Model of Classical Conditioning
Sample equipment maintenance log. Sample equipment maintenance log.
A medical assistant performs a spirometry test using electronic health record software. A medical assistant performs a spirometry test using electronic health record software.
Patient having glaucoma test. Patient having glaucoma test.
If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ... If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ...
Suppose a country imports televisions. The country's supply and demand curves are shown in ... Suppose a country imports televisions. The country's supply and demand curves are shown in ...
Video: Pores and Ion Channels

For a complete list of videos, visit our video library