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

Author Question: In experiments, the greater the time between observations (O1 and O2), the greater the chance of a ... (Read 66 times)

lak

  • Hero Member
  • *****
  • Posts: 546
on: Jun 29, 2018
In experiments, the greater the time between observations (O1 and O2), the greater the chance of a history or maturation effect confounding the experiment.
 
 Indicate whether the statement is true or false

Question 2

Explain reasons for taking a sample rather than a complete census.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Tonyam972

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jun 29, 2018
Answer to Question 1

T
Time between observations increases the possibility of both history effect and maturation effect.

Answer to Question 2

There are several reasons for taking a sample rather than a complete census. One is for pragmatic reasons - applied marketing research projects usually have budget and time constraints. In most situations, sampling cuts costs, reduces labor requirements, and gathers vital information quickly. Another major reason for sampling is that most properly selected samples give results that are reasonably accurate. Larger samples allow conclusions to be drawn with more confidence that they truly represent the population. Sometimes, a sample may even be more accurate than a census due to fewer interviewer mistakes, tabulation errors, and other nonsampling errors. A third reason to take a sample rather than a census is the fact that many research projects require the destruction of the items being tested.


lak

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Jun 29, 2018
Correct answers!


Tonyam972

  • Sr. Member
  • ****
  • Posts: 342
Reply #3 on: Jun 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Mendel's Monohybrid Experiments Mendel's Monohybrid Experiments
The principle of faunal succession uses animal fossils to tell relative time. The principle of faunal succession uses animal fossils to tell relative time.
Organizational Effects of Testosterone Around the time of birth, testosterone masculinizes and defem Organizational Effects of Testosterone Around the time of birth, testosterone masculinizes and defem
This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev This portrait of Thomas Jefferson is considered an accurate likeness, painted when he was thirty-sev
Observed Mother–Child Arguments at Five Time Points Over an Eight-Year Period Observed Mother–Child Arguments at Five Time Points Over an Eight-Year Period
The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p
Video: What Are Carbohydrates? Importance of Carbs & High Carb Food

For a complete list of videos, visit our video library