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]
2 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]2 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
Bobbi can mow the park in 3 hours and Deshaun can do the same job in 7 hours. How long will it take them to mow the park
Bogdan [553]

Answer:

2.1 hours (2 hours and 6 minutes)

Step-by-step explanation:

The rate of work of Bobbi is ⅓ while for Deshaun is 1/7 hence combined rate will be

⅓+1/7=(7+3)/21=10/21

The equivalent hours is the reciprocal of the above hence 1021/10=2.1 hours

0.1 of an hour is equivalent to 0.1*60=6 minutes

Therefore, the efforts combined will take 2.1 hours or 2 hours and 6 minutes

7 0
3 years ago
1,2,3 or 4?<br><br> Look at the picture. <br> Thank u!
Georgia [21]

Answer:

option 2

4/7

Step-by-step explanation:

Multiply 4/3x3/7 = 12/21

now simplify  12/21 = 4/7

7 0
2 years ago
PLEASE HELP ASAP I WILL GIVE BRAINLIEST AND 100pts!!!!!!!!!!!!!!!!!!!!!!!!!!
tigry1 [53]

Answer:

will this help?

4 0
2 years ago
Read 2 more answers
determine the equation of the line that has the given slope and travels through thegiven point (3,-4) and m=2
iren2701 [21]
Y = mx + c
-4 = 2(3) + c
-4 = 6 + c
-10 = c

y = mx + c
y = 2x - 10
Hence, the equation is y=2x-10.
6 0
2 years ago
Determine which statements are true about the extrema of the graphed fourth degree polynomial. Select all that apply.
dusya [7]

C and D are the answers


7 0
3 years ago
Read 2 more answers
Other questions:
  • A cone has a height of 2.5 in. and a radius of 5 in. What is the volume of the cone? (Use 3.14 for . Round the answer to two dec
    13·2 answers
  • An architect is creating a scale model of a building. The building will stand at 1,000 yards, and the scale shows that 2 inches
    14·1 answer
  • In a certain parking lot 1 out of every 9 blue cars. What percent of the cars in this lot is blue​
    9·2 answers
  • 297, 252, 207, 162, ?
    6·2 answers
  • Can anyone help me answer this ?
    11·1 answer
  • I’m not sure how to set the problem up. Please help, thank you
    6·1 answer
  • Why does multiplying numbers by 10 move the decimal point to the right , but multiplying by 0.10 moves the decimal point to the
    8·2 answers
  • 4√2 divided by the square root of 2​
    11·1 answer
  • Help, please!
    8·1 answer
  • What is the sum of LuAnn's three cards?<br> first card: -12<br> second card: 3<br> third card: -5
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!