Answer:
b
Explanation:
a. (x-2)/(x-1) =(7/9-2)/(7/9-1)
=<u>-</u><u>1</u><u>1</u><u>/</u><u>9</u><u> </u> =11/2 >x
-2/9
b. <u>7</u><u>/</u><u>9</u><u>+</u><u>1</u> =<u>1</u><u>6</u><u>/</u><u>9</u> =-8<x
7/9-1 -2/9
c. <u>1</u><u> </u><u> </u> =9/7 >x
7/9
d. <u>(7/9+1)</u><u> </u> =<u>16/9 </u><u>=</u> 16/7 >x
7/9 7/9
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:
The astronaut was asleep longer on earth then he was in space
Explanation:
calculate the boring stuff (speed, time) and it shows that he was asleep for a greater value in space
Answer:
the ability to work less than a line cook while making more money.
Hope this helps!
Sincerely; Victoria<3
Explanation:
