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 101 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?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Controlled Experiments Manipulate a Variable Controlled Experiments Manipulate a Variable
Mendel's Monohybrid Experiments Mendel's Monohybrid Experiments
Adenosine, Time of Day, and Hunger Adenosine, Time of Day, and Hunger
Sterilization Time Requirements Sterilization Time Requirements
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ... The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ...
The Hfr chromosome time-of-entry map is assembled from the recombinant data The Hfr chromosome time-of-entry map is assembled from the recombinant data
Video: Plant Defense Mechanisms from Pathogens

For a complete list of videos, visit our video library