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

Author Question: Which of the following describes an experiment? a. Create differences in the explanatory variable ... (Read 15 times)

pragya sharda

  • Hero Member
  • *****
  • Posts: 566
on: Jul 24, 2018
Which of the following describes an experiment?
 a. Create differences in the explanatory variable and then examine the results.
  b. Observe differences in the explanatory variable and then notice whether these are related to differences in the response variable.
  c. Both a) and b) are experiments.
  d. Neither a) nor b) are experiments

Question 2

Give two reasons why we must sometimes use an observational study instead of an experiment.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

morganmarie791

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

1) IT IS UNETHICAL OR IMPOSSIBLE IN CERTAIN SITUATIONS TO ASSIGN PEOPLE TO RECEIVE A SPECIFIC TREATMENT (SUCH AS SMOKING); 2) CERTAIN EXPLANATORY VARIABLES, SUCH AS LEFT VS. RIGHT HANDEDNESS, ARE INHERENT TRAITS AND CANNOT BE RANDOMLY ASSIGNED.

MULTIPLE CHOICE QUESTIONS


pragya sharda

  • Member
  • Posts: 566
Reply 2 on: Jul 24, 2018
Excellent

robbielu01

  • Member
  • Posts: 336
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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.

An electron micrograph from an experiment demonstrating the function of a tight junction An electron micrograph from an experiment demonstrating the function of a tight junction
Stones create distinctive microclimates Stones create distinctive microclimates
Alternate sites that can be used to create a new opening (-ostomy) in the colon. Alternate sites that can be used to create a new opening (-ostomy) in the colon.
Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th
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 location of the variable fuel sensor can vary, depending on the make and model of vehicle, but ... The location of the variable fuel sensor can vary, depending on the make and model of vehicle, but ...
Video: Negative Feedback Regulation of Blood Pressure

For a complete list of videos, visit our video library