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

Author Question: Explain how systematic or nonsampling error occurs in experiments and discuss ways to minimize ... (Read 67 times)

oliviahorn72

  • Hero Member
  • *****
  • Posts: 579
on: Jun 28, 2018
Explain how systematic or nonsampling error occurs in experiments and discuss ways to minimize it.

Question 2

List the four important elements in experimental design.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

emily12345

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jun 28, 2018
Answer to Question 1

Systematic or nonsampling error may occur if the sampling units in an experimental cell are somehow different than the units in another cell, and this difference affects the dependent variable. Randomization, which is the random assignment of subject and treatments to groups, is one device for equally distributing the effects of extraneous variables to all conditions. The presence of nuisance variables will not be eliminated, but they will be controlled because they are likely to exist to the same degree in every experimental cell. Matching the respondents on the basis of pertinent background information is another technique for controlling systematic error by assigning subjects in a way that their characteristics are the same in each group.

Answer to Question 2

Experimental designs involve no less than four important design elements:
(1) Manipulation of the independent variable
(2) Selection and measurement of the dependent variable
(3) Selection and assignment of experimental subjects
(4) Control over extraneous variables


oliviahorn72

  • Member
  • Posts: 579
Reply 2 on: Jun 28, 2018
Excellent

laurnthompson

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Mendel's Monohybrid Experiments p1 Mendel's Monohybrid Experiments p1
Four ways to visualize protein structure Four ways to visualize protein structure
Emerging adults often feel adult in some ways but not others. Emerging adults often feel adult in some ways but not others.
Each subculture provides its members with values and distinctive ways of viewing the world. What ... Each subculture provides its members with values and distinctive ways of viewing the world. What ...
The transition between steps usually occurs at a temperature that would not interfere with cold ... The transition between steps usually occurs at a temperature that would not interfere with cold ...
Controlled Scientific Experiments Scientists use experimental research to test hypotheses Controlled Scientific Experiments Scientists use experimental research to test hypotheses
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library