Answer:
Step-by-step explanation:
Hola!
Las variables aleatorias pueden Cualitativas o cuantitativas.
Las variables aleatorias cualitativas son aquellas que se refieren a atributos o características de los individuos o unidades de interés que no son cuantificables. Dentro de estas variables se pueden identificar dos tipos:
Ordinales: estas variables representan cierto tipo de cualidad que tiene un orden natural, por ejemplo: Opinión de una persona sobre una película de estreno, calificada en "muy buena", "buena", "regular", "mala", "muy mala"
Estas calificaciones son claramente cualidades, pero tienen un orden, todo el mundo sabe que una calificación "regular" es mejor que una "muy mala" y a su vez peor que una calificación "buena"
Nominales: Son aquellas que indican atributos no cuantificables que no tienen un orden natural. Por ejemplo, color de cabello, raza, sexo.
Las variables aleatorias cuantitativas son aquellas que registran valores numéricos, dicho de manera coloquial: "cuentan cosas". Estas variables siempre toman valores dentro de un rango o intervalo de definición, teniendo esto en cuenta podemos definir dos tipos de variables aleatorias cuantitativas:
Continuas: pueden tomar cualquier valor dentro del intervalo de definición de la variable, por ejemplo, la estatura, el peso, la temperatura, entre un valor y otro existen infinita cantidad de valores que la variable puede tomar. En muchos casos, esto está restringido a la precisión de los métodos utilizados para tomar las mediciones.
Por ejemplo, una balanza puede tomar pesos de kilogramo a kilogramo, ej: 20kg, 21kg, 22kg mientras que una más precisa puede tomar pesos intermedios de los mismos objetos, ej: 20.1kg, 21.5kg, 22.9kg y otra más precisa puede indicar mediciones más exactas, ej: 20.142kg, 21.538kg, 22.973kg es decir que, cuanto más precisa la balanza que usemos para obtener las mediciones, mayor será la gama de valores que puede tomar la variable.
Discretas: solo pueden tomar ciertos valores dentro del intervalo de definición de la variable aleatoria, a diferencia de las variables continuas, entre los valores posibles que pueden tomar estas variables, no se encuentra nada, es decir que "saltan" de valor en valor. Por esto también se las llama variables discontinuas.
Uno de los ejemplos más comunes de variable discreta es hacer rodar un dado de 6 caras, la variable puede tomar valores 1, 2, 3, 4, 5, 6 pero no puede tomar valores entre esos valores, es decir, el dado nunca va a mostrar valores intermedios como "2.5" o "3.3".
Dicho esto pasemos a identificar el tipo de cada ejemplo:
a) y c) Calidad del producto
Esta es algo engañosa, porque todo depende de la escala determinada para medir la calidad.
Es decir, si la escala de medición de la calidad de un objeto es de 0 a 10, siendo cero lo peor y 10 lo mejor, entonces la variable es cuantitativa discreta.
Sin embargo, si la escala es nominal, por ejemplo: Alto, medio, bajo, entonces la variable es cualitativa y como las categorías tienen un orden natural, no solo es cualitativa, sino que también es ordinal.
b) y d) Tiempo de publicidad
Esta variable aleatoria "cuenta el tiempo", toma valores numéricos con lo cual es cuantitativa y, además, puede tomar cualquier valor dentro del intervalo de definición, todo depende de la precisión del reloj utilizado lo que la califica como variable continua.
Espero que tengas un buen días!
A line with a slope of -2 crosses the y-axis at (0, 3). The equation of the line is ____
Answer:
y=-2x+3
Step-by-step explanation:
equation for slope is y=mx+b
the slope is -2 so that equals m
(0,3) is the y-intercept
y=b
3 is the y value making it substitute b making the equation y=-2x+3
Robert gets a loan from his bank. He agrees to borrow £6,000 at a fixed annual simple interest rate of 7%. He also agrees to pay the loan back over a 10-year period. How much money in total will he have paid back at the end of the 10 years?
Answer:
The total amount repayable will be £8,280.24.
Step-by-step explanation:
Use the attached formula
How many digits will be in the quotient?
39 4,641
Answer:
the answer is 119 so three digits
Step-by-step explanation:
Answer:
3 digits
Step-by-step explanation:
4641/39=119
Please answer correctly !!!! Will mark brainliest !!!!!!!!!!!!
Answer:
[tex]x^2+10x+24[/tex]
Step-by-step explanation:
So just multiply the sides:
[tex]x^2+6x+4x+24[/tex]
Which is:
[tex]x^2+10x+24[/tex]
Find the sum of 6(1-a^2), -2(3-a+2a^2) and 5(-2a+3a^2)
Answer:
[tex]5a^2-8a[/tex]
Step-by-step explanation:
[tex]6(1-a^2)-2(3-a+2a^2)+5(-2a+3a^2)[/tex]
[tex](6)(1)+(6)(-a^2)+(-2)(3)+(-2)(-a)+(-2)(2a^2)+(5)(-2a)+(5)(3a^2)[/tex]
[tex]6+-6a^2+-6+2a+-4a^2+-10a+15a^2[/tex]
[tex](-6a^2+-4a^2+15a^2)+(2a+-10a)+(6+-6)[/tex]
[tex]5a^2-8a[/tex]
pleass more math help
Please help me!!!!!!
Answer:
C
Step-by-step explanation:
The addition of the x^5 term makes it non proportional
Answer:
C.
Step-by-step explanation:
A. y = (6x + 3) - 3= 6x
B. y = - 15x
D. = - 1/3 x
All of these are proportional because they have general formula y = kx.
equation of a straight line (see attached)
Answer:
y = 2x - 1
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = A(4, 7) and (x₂, y₂ ) = B(2,3)
m = [tex]\frac{3-7}{2-4}[/tex] = [tex]\frac{-4}{-2}[/tex] = 2 , thus
y = 2x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (2, 3), then
3 = 4 + c ⇒ c = 3 - 4 = - 1
y = 2x - 1 ← equation of line
Solve for m.
3>m+8/5
plz helppppp
Answer:
m < 1.4
Step-by-step explanation:
Make [tex]\frac{8}{5}[/tex] a decimal.
1.6
3 > m + 1.6
m < 1.4
Jasper decided to save $100 at the end of each month for a year and deposit it in a bank account that earns an annual interest rate of 0.3%, compounded monthly. Use the formula for an annuity, F, to determine how much money will be in the account at the end of the 6th month, rounding your answer to the nearest penny.
Note: Your interest rate must be converted to a decimal
Answer: 600.38
Step-by-step explanation:
just put in the answer you lazy
What is the shape of the cross-section formed when a cylinder intersects a
plane as shown in the drawing?
Answer:
circle,
Step-by-step explanation:
disc in the middle vertically in this case is equal to the bases
The intersection is called an Oval. Hence the correct option is A. An oval in mathematics is a shape just like a circle but with an elongated outline like the shape of an egg.
What is a Cross-section?A cross-section is a surface, an area that is created or exposed by executing a straight cut across or through a shape.
Cross-sections in technical drawings are used for depicting the internal view of an object that is three-dimensional.
Learn more about Cross-Sections are:
https://brainly.com/question/10511133
En un programa de televisión se hacen 30 preguntas. Por cada respuesta correcta se suman 8 puntos, por cada respuesta errónea se restan 5 puntos y por aquellas preguntas que no se contesten no se suman ni se restan puntos. Si un participantes obtuvo 13 puntos, ¿Cuantas respuestas erróneas pudo tener?
Answer:
7 wrong answers.
Step-by-step explanation:
We know that when you answer a question well, you earn 8 points and a bad one loses 5 points, this means that when you answer 1 good and 1 bad, there is a total of 3 points (8-5).
This means that when answering 5 good and 5 bad, in total it would be 3 * 5 points, that is to say 15 points, that is, it goes through 2 points. To subtract 2 points, you would have to answer 1 good and 2 bad, (8 - 2 * 5), which turns out to be -2 points.
In total there would be 6 questions right and 7 questions wrong, like this:
8 * 6 + 5 * 7 = 13
13 points, in 13 questions (6 correct + 7 incorrect)
The rest of the questions were not answered so that the score does not go up or down.
Which means you got 7 wrong answers.
Before graduating this year, a senior homeroom was given a survey. Of those surveyed, 24% felt they learned better at home. Of this group, 80% said they plan on taking an online course in college. Of the students who felt they did not learn better at home, 40% said they plan on taking an online course in college
Part A
What is the probability a person who does not plan on taking an online course felt they learned better at home?
A : 2/21
B : 24/125
C : 38/125
D : 19/31
E :None of these
Part B
What is the probability a person who does plan on taking an online course felt they did not learn better at home?
A : 2/21
B : 24/125
C : 38/125
D : 19/31
E : None of these
Answer:
(A) The correct option is (A).
(B) The correct option is (E).
Step-by-step explanation:
The events can be defined as follows:
X = students felt they learned better at home
Y = students plan on taking an online course in college
The information provided is:
P (X) = 0.24
P (Y|X) = 0.80
P (Y|X') = 0.40
[tex]P(Y'|X)=1-P(Y|X)\\=1-0.80\\=0.20[/tex]
[tex]P(Y'|X')=1-P(Y|X')\\=1-0.40\\=0.60[/tex]
The Bayes' theorem states that the conditional probability of an event E[tex]_{i}[/tex] given that another event A has already occurred is:
[tex]P(E_{i}|A)=\frac{P(A|E_{i})P(E_{i})}{\sum {P(A|E_{i})P(E_{i})}}[/tex]
(A)
Compute the probability a person who does not plan on taking an online course felt they learned better at home as follows:
Use the Bayes' theorem.
[tex]P(X|Y')=\frac{P(Y'|X)P(X)}{P(Y'|X)P(X)+P(Y'|X')P(X')}[/tex]
[tex]=\frac{0.20\times 0.24}{(0.20\times 0.24)+(0.60\times 0.76)}\\\\=0.09524\\\\\approx 0.095[/tex]
Thus, the probability a person who does not plan on taking an online course felt they learned better at home is 0.095 or 2/21.
(B)
Compute the probability a person who does plan on taking an online course felt they did not learn better at home as follows:
[tex]P(X'|Y')=1-P(X|Y')\\=1-0.095\\=0.905[/tex]
Thus, the probability a person who does plan on taking an online course felt they did not learn better at home is 0.905.
please solve y = 3x - 1
Step-by-step explanation:
i think question is not complete.
The circumference of the earth is given.
Circumference of earth: 24,901 miles
What is the diameter of earth? Round your answer to the nearest tenth. Use 3.14 for π.
Answer:
7930.3 miles = d
Step-by-step explanation:
The circumference equals
C = pi *d
24901 = 3.14 d
Divide each side by 3.14
24901 / 3.14 = d
7930.254777 = d
Rounding to the nearest tenth
7930.3 =d
k (t) = 10t - 19
k(-7) =
Answer:
k(-7) = - 89
Step-by-step explanation:
k (t) = 10t - 19
Let t = -7
k(-7) =10 * -7 - 19
=-70-19
-89
Answer:
[tex]k (-7) = -89[/tex]
Step-by-step explanation:
[tex]k (t) = 10t - 19[/tex]
[tex]k (-7) = 10(-7) - 19[/tex]
[tex]k (-7) = -70 - 19[/tex]
[tex]k (-7) = -89[/tex]
Please help! Correct answer only, please! I need to finish this assgnment this week! Matrix P has a dimensions of 3 X 4 and Matrix Q has the dimensions 4 X 5. Determine the dimensions of the matrix PQ if it is possible. Explain why if it is not. (refer to video part 4) Group of answer choices A. Matrix PQ would have the dimensions 3 X 4 B. Matrix PQ would have the dimensions 4 X 5 C. Matrix PQ would have the dimensions 3 X 5 D. These matrices can not be multiplied because their dimension don't align.
Answer: C
Step-by-step explanation:
Your answer is correct! When you multiply 2 matrices, the inner dimensions have to be equal. If they are equal, the resulting dimensions would be the outer dimentions.
(3×4)(4×5)
Since the inner (bolded) dimensions are the same, in this case 4×4, we know these matrices can be multiplied.
Since these matrices can be multiplied, the product will be 3×5, the underlined outer dimensions.
Identify the like terms in the expression.
Answer:D
The answer is D.
Step-by-step explanation:
Like terms are only related to the variable at the end, and the variable also has to have the same exponent or it is not a like term.
8. Where will the hour hand of a clock stop if it starts:
a.
from 7 and turns through 1 right angle?
b. from 11 and turns through 3 right angles
can you plz say me the answer
Answer:
a. 11
b. 9
Step-by-step explanation:
thats the answer
Find the value of a . A.18 B.21 C.20 D.17
Answer:
a =18
Step-by-step explanation:
The two angles are vertical angles and vertical angles are equal
6a +11 = 2a+83
Subtract 2a from each side
6a-2a +11 = 2a-2a+83
4a +11 =83
Subtract 11 from each side
4a +11 -11 = 83-11
4a = 72
divide each side by 4
4a/4 = 72/4
a =18
If 4 1/2 = 2, 8 1/1= 2, and 16 then for what value of xwould x 1/5 = 2?
24
32
02
04
Answer:
D) 0.0004
Step-by-step explanation:
(0.02)^2=0.02*0.02=0.0004
Which angle in ADEF has the largest measure?
Answer:
F is the largest angle
Step-by-step explanation:
The largest angle is opposite the largest side. The smallest angle is opposite the smallest side.
The largest side is 4 so the largest angle is F
Can someone please help
Answer:
The numbers to input are 2, 2 , 7
Step-by-step explanation:
252 = 2² * 3² * 7
So the numbers to input are 2, 2 , 7
You are going to use an incline plane to lift a heavy object to the top of a shelving unit with a height of 5 ft. The base of the incline plane is 15 ft from the shelving unit. What is the length of the incline plane?
Answer:
15.8 ft
Step-by-step explanation:
The inclined plane, the base of and the shelving unit form the shape of a right angled triangle.
The hypotenuse is the length of the inclined plane, h.
The base of the triangle is 15 ft.
The height of the triangle is 5 ft.
To find the hypotenuse, h, we have to use Pythagoras rule:
[tex]h^2 = a^2 + b^2[/tex]
where a = height of the triangle
b = base of the triangle
Therefore:
[tex]h^2 = 5^2 + 15^2\\\\h^2 = 25 + 225 = 250\\\\h = \sqrt{250}\\ \\h = 15.8 ft[/tex]
The inclined plane is 15.8 ft long.
PLS HELP
Simplify the function f(x) =
3x
(81)
4
Then determine the key aspects of the function.
The initial value is
The simplified base is
The domain is
The range is
Answer:
Step-by-step explanation:
This follows the form
[tex]y=a(b)^x[/tex]
where a is the initial value and b is the base with the exponent. Using that information, we can see that the initial value in our function is 1/3. Simplifying the base will take some work. Let's first rewrite this is a radical:
[tex]81^{\frac{3x}{4} }=\sqrt[4]{81^{3x} }[/tex]
Now let's break up 81 into its factors. 81 is 9*9 which is 3*3*3*3. Therefore,
[tex]81=3^4[/tex]
We will use that as a simplification:
[tex]\sqrt[4]{(3^4)^{3x}}[/tex] which simplifies to
[tex]\sqrt[4]{3^{12x}}[/tex]
Rewriting that as an exponent looks like this:
[tex]3^{\frac{12x}{4}}[/tex] which simplifies to
[tex]3^{3x}[/tex]
That's the answer for the second part. The whole exponential equation now is
[tex]f(x)=\frac{1}{3}(3)^{3x}[/tex]
The domain for an exponential function is all real numbers and the range is
y > 0
Answer:
1/3
27
all real numbers
y > 0
ON EDGE
Step-by-step explanation:
12. What is the measure of an angle if it is nine times
its own
supplement?
Angle
degrees
Answer:
if it's the right angle and it nine times it own
I think it would be 180 degress
HELPPPPPP ITS ABOUT EQUATIONSSSS HELPPPPP Explanation needed HELPPPPP PLEASEE THIS IS THE LAST QUESTION LEFTTTTTTT
Answer:
C. the average total cost for the first month of a gym membership
Step-by-step explanation:
x=1 is for month 1,
the value of y includes 1-month fee and one off payment, so this is the average total for the first month of membership
Answer:
It is the average total cost for the first month of a gym membership
Step-by-step explanation:
y = 34.99x+49
The 49 is the cost to join the gym and the 34.99 is the monthly cost
Let x =1 which is the cost after one month
It includes the cost to join and the 1st month membership
It is the average total cost for the first month of a gym membership
(3x5−2x4−5)−(2x4+x2−10) Subtract the two polynomials
Answer:
3x^5-4x^4-x^2+5
Step-by-step explanation:
(3x^5−2x^4−5)−(2x^4+x^2−10)
Distribute the minus sign
(3x^5−2x^4−5)−2x^4-x^2+10
Combine like terms
3x^5-4x^4-x^2+5
Hello!
Answer:[tex]\boxed{ \bf 3x^5~-~4x^4~-~x^2~+~5}[/tex]
__________________________________Explanation:(3[tex]x^{5}[/tex] - 2[tex]x^{4}[/tex] - 5) - (2[tex]x^{4}[/tex] + x² - 10)
Drop the brackets:
3[tex]x^{5}[/tex] - 2[tex]x^{4}[/tex] - 5 - 2[tex]x^{4}[/tex] - x² + 10
Combine Like Terms:
3[tex]x^{5}[/tex] - 2[tex]x^{4}[/tex] - 2[tex]x^{4}[/tex] - x² - 5 + 10
3[tex]x^{5}[/tex] - 4[tex]x^{4}[/tex] - x² + 5
An automobile salesman receives a monthly bonus check if his commission income is at least $7,700.00 in a given month. There are 48 automobiles on the lot for sale and he receives a commission of $700.00 per sale. Which inequality shows the number of automobiles,x , the salesman must sell in order for him to receive a bonus check at the end of the month?
Answer:
The inequality that represents the number of cars he needs to sell is: [tex]x \geq 11[/tex]
Step-by-step explanation:
The commission received by the salesman, can be modeled by the following expression:
[tex]\text{commission}(x) = 700*x[/tex]
Where "x" is the number of sold cars. Since he needs to achieve a commission value of at least 7700, then the inequality that represents the number of cars he needs to sell is:
[tex]700*x \geq 7700[/tex]
We can solve for "x" in order to find the number of cars he needs to sell:
[tex]x \geq \frac{7700}{700}\\\\x \geq 11[/tex]
He needs to sell at least 11 cars.
What the answer to this
Answer:
I think it might be a I don't know for sure though I just need some more points so I can ask a question myself sorry if this didn't help
