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

Author Question: Why is a random sample necessary when conducting a true experiment? a. Without it, internal ... (Read 70 times)

Evvie72

  • Hero Member
  • *****
  • Posts: 519
on: Jun 19, 2018
Why is a random sample necessary when conducting a true experiment?
 
  a. Without it, internal validity and external validity are compromised.
  b. Without it the experiment can be internally valid, but will not have external validity.
  c. Without it, the reliability and validity of the experiment are compromised.
  d. It is not necessary to have a random sample when conducting an experiment.

Question 2

Descriptive statistics are used to _________.
 
  a. calculate the mean and standard deviation of a sample
  b. calculate the mean and standard deviation of a population
  c. graph a distribution of raw scores
  d. all of these


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

brittiany.barnes

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jun 19, 2018
Answer to Question 1

D
Experiments investigate relationships between variables. It is not necessary to have random samples to do this.

Answer to Question 2

D


Evvie72

  • Member
  • Posts: 519
Reply 2 on: Jun 19, 2018
Excellent

connor417

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

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?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Parenting Styles Reported by a Representative Sample of American Adolescents Parenting Styles Reported by a Representative Sample of American Adolescents
Sample Teaching Plan for Hypertension Cont. Sample Teaching Plan for Hypertension Cont.
Counterbalancing in the Predator Experiment Counterbalancing in the Predator Experiment
Sample prescriptions of drugs for oral fungal infections. Sample prescriptions of drugs for oral fungal infections.
he Luria-Delbriick Experiment Demonstrating Are Spontaneous he Luria-Delbriick Experiment Demonstrating Are Spontaneous
Video: Glycolysis - and oxygen

For a complete list of videos, visit our video library