Answer:
She did not separate her friends into different groups, and she didn't apply a treatment.
Step-by-step explanation:
Alice decides to ask 25 of her friends if they listen to music while they do their homework and what their grades are.
She finds that her friends who have high grades also listen to music while they do their homework.
She tells her parents that she has proven that listening to music while doing homework will cause her grades to improve.
First of all it cannot be proven like this way.
Secondly, she did not use a random sample, and did not separated her friends into groups and applied treatment.
So, the answer is She did not separate her friends into different groups, and she didn't apply a treatment.
Answer:
Step-by-step explanation:
Take the sum of each answer and add the two digits together.
9.2=18 1+8=9
9.3=27 2+7=9
9.4=36. 3+6=9
The sum of the digits added together will always equal 9
Answer: 11219861986
Step-by-step explanation: i used a calculator
Ben drinks 3 1/2 liters of tea every 40 minutes.
This means that he would drink 1 3/4 of tea every 20 minutes (divide both sides by 2).
Now, let's multiply each side by 3.
1.75 * 3 = 5.25 (aka 5 1/4)
20 * 3 = 60 minutes (an hour)
He drinks 5 1/4 liters of tea in one hour.
