1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kherson [118]
3 years ago
5

Elena is conducting an experiment to determine if the high school students are more relaxed when the lights are off or when musi

c is played during an exam. She selects 10 of her friends to take an exam with the lights off and another 10 of her friends to take an exam with music playing.
Required:
What is problematic about the way that Elena selected her groups?
Mathematics
1 answer:
Sedaia [141]3 years ago
4 0

Answer:

Problematic is that - only one factor should be analysed at a time. However she has considered both.

Step-by-step explanation:

Groups for any experimental study should be selected on the basis of one variable, other factor(s) remaining constant.

In this case, here are two variables - lights on or off, music playing or not playing - effecting relax level during exams.

She selects 10 students for exam with lights off , 10 for exam without music. This is problematic, as at once only lights or only music factor should be considered.

If one group is with light on , other should be with light off. If one group is with music, other should be without music. This mix up of one light off aspect & one music without music is inapt.

You might be interested in
PLZZZZ HELP!!!!!!!!! In this activity, you'll design a simulation for this scenario: If about 90% of men are 73 inches tall or s
AURORKA [14]

Answer:90 the height of the tallest man is 90

8 0
4 years ago
Joley is opening her first checking account as a teenager. She doesn’t have a job, so most of the income will be presents from b
stepladder [879]

Answer:     $850.

Step-by-step explanation:   just subtract by 8 every month for account A and take away 1% from account b every month.

6 0
3 years ago
Read 2 more answers
Which segment is both a chord and a diameter? segment PLEASE HELP ME!!!!
xz_007 [3.2K]

Answer:

∠AEC = 105°

Step-by-step explanation:

If two chords intersect each other in a circle then the vertical angles formed are equal.

In this question two chords AB and CD intersect each other at point E then ∠DEB and ∠AEC are vertical angles which are equal.

Therefore ∠DEB = ∠AEC

Here m∠DEB = 105°

Then m∠AEC = 105° ( by Theorem)

Therefore the correct answer is ∠AEC = 105°

5 0
4 years ago
Read 2 more answers
The American Civil War (also known by other names) was a civil war in the United States from 1861 to 1865, fought between northe
Musya8 [376]

Step-by-step explanation:

The American Civil War (also known by other names) was a civil war in the United States from 1861 to 1865, fought between northern states loyal to the Union and southern states that had seceded to form the Confederate States of America. The principal cause of the war was the status of slavery in the United States, especially in the territories. After Abraham Lincoln won the November 1860 presidential election on an anti-slavery platform, an initial seven slave states declared their secession from the country to form the Confederacy. War broke out in April 1861 when secessionist forces attacked Fort Sumter in South Carolina, just over a month after Lincoln's inauguration. An additional four slave states joined the Confederacy in the following two months. The Confederacy grew to control at least a majority of territory in those eleven states (out of the 34 U.S. states in February 1861), and it claimed the additional states of Kentucky and Missouri by assertions from native secessionists fleeing Union authority. These states were given full representation in the Confederate Congress throughout the Civil War. The two remaining slave states, Delaware and Maryland, were invited to join the Confederacy, but Delaware declined and nothing substantial developed in Maryland due to intervention by federal troops. The Confederate states were never diplomatically recognized as a joint entity by the government of the United States, nor by that of any foreign country. The states that remained loyal to the U.S. were known as the Union. The Union and the Confederacy quickly raised volunteer and conscription armies that fought mostly in the South for four years. Intense combat left between 620,000 and 750,000 soldiers dead, along with an undetermined number of civilians. The Civil War remains the deadliest military conflict in American history, and accounted for more American military deaths than all other wars combined until the Vietnam War. The war effectively ended on April 9, 1865, when Confederate General Robert E. Lee surrendered to Union Ge…

Jk! drop a pic of doja cat here

3 0
3 years ago
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B
Marta_Voda [28]

Answer:

x=2

y=-3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • When factoring x^2 + 9x + 18, what's the first thing you should look at?
    15·1 answer
  • A farmer is planting 10 peach trees. He says he plans to plant five rows of trees with four trees in
    6·1 answer
  • Add the polynomials. <br> (7y^2+2y-9)+(-3y^2-y) = ?
    11·1 answer
  • How do you draw a net of a rectangular and triangular prism?
    10·1 answer
  • Bus A travels according to the function y = 125/5x where y is distance traveled in miles and x is time in hours. Bus B travels a
    9·1 answer
  • PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!! I NEED TO FINISH THESE QUESTIONS BEFORE MIDNIGHT TONIGHT.
    12·1 answer
  • Need Math help ASAP
    11·1 answer
  • Please help for 30 points
    14·1 answer
  • Please help this is important
    5·1 answer
  • Translate the sentence into an equation using n as the unknown number. Then solve the equation for n.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!