The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
Learn more about internal validity on:
brainly.com/question/968894
#SPJ1
COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
Answer:
lol no. They are still frogs but you probaly not do that. lol
Explanation:
Answer:
Correct
Explanation:
Trust meee. Taking the quiz now:)
Answer:
so probability none of these vehicles requires warranty service is 0.389416
Explanation:
given data
new vehicles require warranty service π = 9 % = 0.09
sold nissan n = 10
solution
As we know here binomial probability formula that is
P(x) = 
......................1
so we use here combination formula that is
.................2
so probability none of these vehicles requires warranty service is
P(0) = 
P(0) = 
P(0) = 0.389416
so probability none of these vehicles requires warranty service is 0.389416
Cool I don’t have an answer for that
