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
Natali5045456 [20]
3 years ago
15

A total of 200 10-year-old children of similar intellectual abilities participated in a noise experiment in their classrooms. Th

ey were tested for their ability to recall the meaning of a symbol in a textbook one week after the start of the experiment. Students did not know the meaning of the symbol prior to the experiment. The 200 students were split into 10 groups of 20 students and were taught the meaning of the symbol during a 15-minute lesson. Five groups learned the meaning of the symbol without any noise pollution outside of their classrooms. The other five groups learned the meaning of the symbol with a noise source of 55 decibels outside their classrooms, maintained continuously for the 15-minute lesson. One week after the lesson, 80% of the students who were not exposed to the noise sources were able to successfully recall the meaning of the symbol and 25% of the students exposed to the noise sources were able to successfully recall the meaning of the symbol. i. Identify the dependent variable in the experiment.
Mathematics
1 answer:
Vladimir79 [104]3 years ago
6 0

Answer:

The dependent variable for this experiment is the ability of students with similar intellectual abilities to recall the meaning of a symbol in a textbook one week after the start of the experiment which depends on the presence or absence of noise outside the classroom.

Step-by-step explanation:

In an experiment, the independent variable is the one whose value, form or outcome is not determined by any other variable in the experiment.

The dependent variable is the one whose value, form or outcome is determined by one or more other variable(s) in the experiment.

This experiment tests the abilities of students with similar intellectual abilities to recall the meaning of a symbol in a textbook one week after the start of the experiment.

This ability was made to depend on whether there was noise or no noise outside their classrooms.

Since, this variable to be measured is determined by another variable in the experiment, it is evident that this is the dependent variable for this experiment.

Hope this Helps!!!

You might be interested in
Two years ago, Paul bought $350 worth of stock in a cell phone company. Since then the value of his stock has been increasing at
vivado [14]

The stock is now worth $415.84 .

7 0
3 years ago
Read 2 more answers
Statuary Hall is an elliptical room in the United States Capitol in Washington, D.C. The room is also called the Whispering Gall
dalvyx [7]

Answer: a) \frac{x^{2} }{2352.25 } + \frac{y^{2} }{529} = 1

b) The distance of two foci is 85.4 feet

c) Area = 3502.67 square feet

Step-by-step explanation: a) An ellipse has the equation in the form of:

\frac{x^{2} }{a^{2} }+\frac{y^{2} }{b^{2} } = 1, where a is the horizontal axis and b is the vertical axis.

For the Statuary Hall, a = \frac{97}{2} = 48.5 and b = \frac{46}{2} = 23, so the equation will be

\frac{x^{2} }{2352.25 } + \frac{y^{2} }{529} = 1.

b) To determine the distance of the foci, we have to calculate 2c, where c is the distance between one focus and the center of the ellipse. To find c, as a, b and c create a triangle with a as hypotenuse:

a^{2} = b^{2} + c^{2}

c^{2} = a^{2} - b^{2}

c = \sqrt{48.5^{2} - 23^{2} }

c = 42.7

The distance is 2c, so 2·42.7 = 85.4 feet.

The two foci are 85.4 feet apart.

c)The area of an ellipse is given by:

A = a.b.π

A = 48.5 · 23 · 3.14

A = 3502.67 ft²

The area of the floor room is 3502.67ft².

3 0
3 years ago
Pls answer!!!!!! The sum of two numbers is 46 and the difference is 20 what are the numbers?
katen-ka-za [31]

Answer:

33 and 13

Step-by-step explanation:

46/2 = 23

difference is 20, add 10 to one and subtract 10 from 23, giving you two numbers: 13 and 33.

7 0
3 years ago
State all integer values of x in the interval (-3, 3] that satisfy the following
Galina-37 [17]

(-3,3] is an interval which means that -3 and 3 are not inclusive of the values of x -5/3.

We have given

-3x+4 > 9

Required values of x.

State the values of x within -3 and 3.

subtract 4 from both sides,

-3x+4-4>9-4

<h3>What is the meaning of like terms?</h3>

like terms are terms that have the same variables and powers. The coefficients do not need to match.

Collect Like Terms

-3x > 5

(-3x)(-1)   <   5(-1)

3x  <  -5

Divide both sides by 3

3x/3 < -5/3

x    <   -5/3

(-3,3] is an interval which means that -3 and 3 are not inclusive of the values of x is -5/3.

To learn more about the interval visit:

brainly.com/question/12221823

#SPJ1

3 0
2 years ago
HELP ASAPPPP<br><br><br> please help me
Flauer [41]

Answer:

x=3, y=4

Step-by-step explanation:

hope this helps!

pls mark brainliest

4 0
2 years ago
Other questions:
  • Use a proportion to find 70% of 34.
    11·2 answers
  • Need helppppppp fast
    9·1 answer
  • If a baking tray is 500mm by 700mm, how many of 25cm in diameter can fit into the  oven
    13·2 answers
  • 6х + Зу = 12<br> Slope-intercept
    8·1 answer
  • If the sum of the daily unpaid balances is $7,812 over a 31-day billing cycle, what is the average daily balance?
    8·1 answer
  • The point R is located at (-5, -5). After translation, R' is the point (-3, -2). What is the translation rule?
    14·1 answer
  • Why does nobody actually help people with questions on here?
    7·2 answers
  • Explain the parts of an angle
    5·1 answer
  • Hannah bought 9 1/2pounds of ground beef to make hamburgers for
    8·1 answer
  • one day a store sells 14 pairs of jeans . The 14 jeans represents 20% of total number of items sold that day. How many items did
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!