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 110 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
YES! Correct, THANKS for helping me on my review

vickybb89

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Using a gauge that measures vacuum in units of inches of water to test the vacuum at the dipstick ... Using a gauge that measures vacuum in units of inches of water to test the vacuum at the dipstick ...
Sample of a weekly bookkeeping ledger. Sample of a weekly bookkeeping ledger.
Two simple reflex arcs Two simple reflex arcs
How does PCA reduce the dimension of a statistical problem? How do you select the reduced ... How does PCA reduce the dimension of a statistical problem? How do you select the reduced ...
A car wash reduced the price of a basic wash as a promotion and test of the market. With the ... A car wash reduced the price of a basic wash as a promotion and test of the market. With the ...
A sample of 400 observations will be taken from an infinite population. The population ... A sample of 400 observations will be taken from an infinite population. The population ...
Video: Regulation of GFR: three methods, autoregulation & autoregulation via myogenic mechanism

For a complete list of videos, visit our video library