« previous next »

Author Question: Holding a variable constant is a technique for removing one threat to ____ but it can limit the ____ ... (Read 153 times)

ap345

  • Hero Member
  • *****
  • Posts: 537
on: Jun 19, 2018
Holding a variable constant is a technique for removing one threat to ____ but it can limit the ____ of an experiment.
 
  a. internal validity; external validity
  b. external validity; internal validity
  c. internal validity; reliability
 d. external validity; reliability

Question 2

In sampling notation, N refers to the ____.
 
  a. number of cases in the sampling frame
  b. number of cases in the sample
 c. number of possible subsets
 d. sampling fraction


huda

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jun 19, 2018
Answer to Question 1

a

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Betelgeuse is a semiregular variable star Betelgeuse is a semiregular variable star
The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
The schematic of a variable valve timing control circuit, showing that battery power (+) is being ... The schematic of a variable valve timing control circuit, showing that battery power (+) is being ...
To help locate how far the engine is being rotated, the technician is removing the distributor cap ... To help locate how far the engine is being rotated, the technician is removing the distributor cap ...
With all vacuum lines and the intake tube removed, the valve cover can be removed after removing all ... With all vacuum lines and the intake tube removed, the valve cover can be removed after removing all ...
When removing spark plugs, it is wise to arrange them so that they can be compared and any problem ... When removing spark plugs, it is wise to arrange them so that they can be compared and any problem ...
Video: Kinetic parameters & Kinetic experiment

For a complete list of videos, visit our video library