Pregunta completa:
Ejercicio. Supongamos que el total de estudiantes en tu escuela es 256. Se te ha pedido elegir
al azar una muestra de 15 estudiantes a los cuales se les aplicará un examen para evaluar las
condiciones físicas en las que se encuentran. Describe en tu libreta al menos dos maneras
diferentes de como podrías realizar la selección de manera que los 15 estudiantes representen
una buena muestra del total de estudiantes
Responder:
Por favor, consulte la explicación
Explicación paso a paso:
Para garantizar que la selección realizada sea representativa, la selección debe ser aleatoria.
1.) Se puede elegir una muestra totalmente aleatorizada de 15 integrantes de niños y niñas en igual proporción. Es decir, si toda la población tiene un 60% de niñas y un 40% de niños, entonces una muestra puede incluir;
0.4 * 15 = 6 niños
0,6 * 15 = 9 niñas
Además, la muestra se puede seleccionar asignando al azar 15 números a un trozo de papel enrollado donde se les puede pedir a todos los estudiantes que elijan. los estudiantes que eligen los trabajos numerados se utilizan como muestra.
Why did investors start using ticker symbols?
A. It was faster to move news using telegraphs with short names
B. Investors liked to use "Text Speak" to communicate in code
C. To confuse "casual investors and keep trading to professionals
D. It makes it faster to look up multiple companies at a time on a computer
Answer:
D?
Step-by-step explanation:
The company names were shortened down to 1-5 character because there were hundred of companies being traded and prices being updated every minute so to make it easier they made ticker symbols. It’s either A or D but i’m pretty sure it’s D..
What is the perimeter of the triangle?
Answer:
30
Step-by-step explanation:
8
If u =
11i + 7j, v= -7i+ 11j find the dot product of u and v?
Let's solve for v.
v=−7i+11
Answer:v=−7i+11
Step-by-step explanation: Hope you understand. Hope this help :)
Let's simplify step-by-step.
11i+7j
There are no like terms.
Answer:=11i+7j
I need to do this no silly answers tho I’ll mark ❗️Brainlyist❗️ if answered correctly!!!
Answer:
that will be 270 ÷ 3 boy.....
Answer:
A
Step-by-step explanation:
[tex]3x \geqslant 270 \\ x \geqslant \frac{270}{3} \\ x \geqslant 90[/tex]
1. Find the slope of the line using the points (0,4) and (-3,6)
Answer:
-2/3
Step-by-step explanation:
A ball is thrown from an initial height of 5 feet with an initial velocity of 32 ft/s. The height h (in feet) after t seconds is represented by the function h=-16t^2+32t+5. Find the maximum height of the ball.
are the ratios 2:3 and 10:18 equivalent
YES OR NO
Answer:
NO
Step-by-step explanation:
an equivalent ration to 2:3 would be 10:15. because when you simpliy 10:15 the most you can you would get 2:3. where as 10:18 is not equal
Yes they are equivalent
Find the slope of the line that passes through -3,62 and 93,82
Answer:
5/24
Step-by-step explanation:
Please help in this
Explanation is in the file
tinyurl.com/wpazsebu
First to answer gets brainliest
Answer:
Answer choice three is correct
:) ur welcome!
cuatro amigos compraron una pizza:leo se comio 1/2 adan 1/4,joel 1/8 evelio se comio la que sobro.dibuja la pizza.dividela como se la repartieron y contesta las preguntas
a) quien comio mas?
b) quienes comieron menos?
c)quienes comieron igual?
d)cuantas pizzas se comieron en total?
Answer:
A) Leo comió más, ya que comió 1/2 de la pizza.
B) Joel y Evelio comieron menos, ya que comieron 1/8 de la pizza.
C) Asimismo, Joel y Evelio comieron igual, ya que cada uno comió 1/8 de la pizza.
D) En total, entre todos comieron una pizza.
Step-by-step explanation:
Dado que cuatro amigos compraron una pizza, de la cual Leo se comió 1/2, Adán 1/4, Joel 1/8 y Evelio se comió lo que sobró, para determinar quién comió más, quién comió menos, quiénes comieron igual y cuántas pizzas se comieron en total se deben realizar los siguientes cálculos:
1/2 + 1/4 + 1/8 + X = 1
4/8 + 2/8 + 1/8 + X = 1
7/8 + X = 1
X = 1 - 7/8
X = 1/8
A piece rare worker is paid __
You and your friend go to an amusement park. You buy t tickets and spend $8 on food.Your friend buys t tickets and spends $12 on food. Is it possible that you and your friend spent the same amount at the amusement park.
Answer:
In the case of 4 tickets it can be possible
Step-by-step explanation:
Let us assume the number of tickets be t
Now as per the question the equations would be
For you = t + $8
For your friend = t + $12
In the case when you both spend the same amount so the above equations would be equivalent to each other
t + $8 = t + $12
So here the tickets would be 4 so this is possible that you both spend the same amounts
what’s the equation of the line shown above?
Answer:
answer is B)y=3x+2
Step-by-step explanation:
here ya go, have a nice day
btw if you can give me brainliest it will help a lot, thanks
What is the arc length of the partial circle?
Answer:
pi/2
Step-by-step explanation:
The arc length is based on the circumference
c = 2 * pi *r
C = 2 * pi *1 = 2pi
This is 1/4 of the circle so the arc length given is 1/4 of the arc length
arc length = 1/4 ( 2pi)
= pi /2
What type of punishment did the police officer give to the air pollution?
Answer:
Mistm Demeanor I think.. Hope this helps, tell me if it's incorrect!
Step-by-step explanation:
A police officer can not punish air pollution but can enforce laws and regulations to protect the environment.
What is air pollution?Air pollution means the presence of harmful substances in the air that can cause harm to all living beings.
We have,
Air pollution is not a living being so it can not be punished by a police officer.
A police officer or government authorities can enforce laws and regulations to reduce air pollution to protect all living beings and the environment.
Some of the measures are:
- Setting emissions standards for automobile and related industries
- Promoting the use of clean energy resources.
- Encouraging individuals and entities to adopt sustainable practices
Thus,
A police officer can not punish air pollution but can enforce laws and regulations to protect the environment.
Learn more about air pollution here:
https://brainly.com/question/18951513
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i need it rn plzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
9514 1404 393
Answer:
∠B = ∠C = 138°
∠D = 42°
Step-by-step explanation:
Angles between the parallel bases are supplementary:
∠B = 180° -∠A = 180° -42° = 138°
Right-side angles are the same measure as their mirrors across the line of symmetry.
∠C = ∠B = 138°
∠D = ∠A = 42°
Which pair of expressions are equivalent?
a. x+y+x+y and 2(x+y)
b. 5(2x-3y) and 10x - 3y
c. 4x - 5y and 5y - 4x
d. 9x +2y and 11xy
52% of what number of 109
Answer:
209.615384
Step-by-step explanation:
Answer:
if you buy an item at $109 with $52 discounts, you will pay $57 and get 47.71% discount.
Step-by-step explanation:
the percent of sales tax is 6%. what is the total cost for a skateboard that cost $98. also, what is the sales tax?
$98×6/100
sales tax =$5.88
$98+$5.88
total cost =$103.88
An unfair coin with a probability of tails as 0.55 is tossed 8 times. Find the probability that a tail shows up more than 2 times.
Answer:
0.9115
Step-by-step explanation:
Using a binomial probability function :
P(x =x) = nCx * p^x * (1 - p)^(n - r)
Probability of success, p = 0.55
1 - p = 1 - 0.55 = 0.45
n = 8
x = 2
P(x > 2 ) = p(x = 3) + p(x = 4) + p(x = 5) + p(x = 6) + p(x = 7) + p(x =8)
To save computation time, we could use the binomial probability calculator :
P(x > 2 ) = 0.9115
Plz help plz
What specific measure of a geometric figure is shown in the image?
A. A 15° angle
B. A 180 mm side length
C. A 165 mm side length
D. A 165° angle
Answer:
A 165° angle
Step-by-step explanation:
I zoomed in on the picture and it was a 165° angle
I need this please help me
Answer:
Step-by-step explanation:
Males Females Total
Soccer 19 31 50
basketball 21 29 50
Total 40 60 100
Number of males Whose favorite sports is soccer = 50 - 31 = 19
Number of females Whose favorite sports is basket ball = 50 - 21 = 29
Part B)
B.Equal number of people like soccer and basketball. - True
C. More females like soccer - True
In the figure shown below, if line l is parallel to line m, then x =
е l
200
65°
m
Answer:
115
Step-by-step explanation:
c
Answer:
Step-by-step explanation:
Which Quadrant does the point (-3, 4) belong to? A. Quadrant I B. Quadrant II C. Quadrant III D. Quadrant IV
Answer:
4
Step-by-step explanation:
how many hours is one quarter of a day?
Answer:
6
Step-by-step explanation:
24/4 is 6, making there be six hours in a quarter of a day
Find the measure of the angle x. Please help!
360 - (75 + 75 + 105) = 105
Solve the inequality. (Enter your answer using interval notation.)
x^2 ≤ 81
Answer
the answer is -9≤x≤9
Answer:
x = (-9,9)
Step-by-step explanation:
|x |< 9 - seperate the inequality into 2 possible cases
1. x<9, x>0 -x<9, x<0
find the intersection
x = (0,9) -x<9, x<0
find the intersection again
x = (0,9) x = (-9,0)
find the union
x = (-9,9)
4^(5 )Identify the base and the exponent in the following expression.
4 is the ______ and the 5 is the _______
Answer:
4 is the BASE and 5 is the EXPONENT
Step-by-step explanation:
Thx i needed this answer :P
The number 5 is the exponent or power and the number 4 is the base of the expression.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
The exponential expression is given as,
⇒ (4)⁵
In the exponential expression aⁿ, the n is the exponent or power and a is the base of the expression.
Then in the exponential expression (4)⁵, the number 5 is the exponent or power and the number 4 is the base of the expression.
More about the Algebra link is given below.
https://brainly.com/question/953809
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How many terms are in the expression 3x + 5 - 4y O 1 O2 03
Answer:
3
Step-by-step explanation:
Answer:
2
Step-by-step explanation: