the statement "The standard deviation is known and n > 30" is the correct circumstance under which a two-population z-test should be used.
A two-population z-test is typically used to compare the means of two independent populations when the sample size is large (n > 30) and the population standard deviation is known.
If the population standard deviation is unknown, a two-population t-test can be used instead. If the sample size is less than 30, a two-population t-test should be used regardless of whether the population standard deviation is known or unknown.
If the population is slightly skewed and n > 40, a two-population z-test may still be used if the sample size is large enough to meet the normality assumption of the sampling distribution of the means. However, in practice, it is recommended to use a t-test instead if the sample size is not too large (less than a few hundred).
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How to find the volume of a cone?
Find the area of the shape shown below
Answer: 15
Step-by-step explanation:
3*3=9
4*3/2=6
9+6=15
Answer:
The area is 15 units squared
Find the least common multiple (LCM) of 6 and 10
Answer:
30
Step-by-step explanation:
Multiples of 6 are 6,12,18,24,30.
Multiples of 10 are 10,20,30.
30 is the number they both have in common first. 30 is the LCM.
Hope this helps!
The least common multiple (LCM) of 6 and 10 is 20
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
6 and 10
The multiples of 6 are 6, 12, 18, 24, 30, 36, ...
The multiples of 10 are 10, 20, 30, 40, 50, 60,...
Now,
The least common multiple (LCM) of 6 and 10.
= 30
Thus,
30 is the LCM of 6 and 10.
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Se lanzan 7 volados consecutivos y en todos ellos ha caído águila. ¿Cuál es la probabilidad de que en el décimo volado también caiga águila? En todos los eventos la probabilidad ha sido ½; por lo cual, en el décimo volado sigue la misma probabilidad 1/2
Respuesta: 0.5
Explicación paso a paso:
El posible resultado es 2:
1.) que cae un águila
2.) que un águila no cae
Cada resultado posible con igual probabilidad:
Probabilidad = resultado requerido / resultados posibles totales
P (cae un águila) = 1/2
P (el águila no cae) = 1 - 1/2 = 1/2
Por lo tanto, la probabilidad de que un águila caiga en la décima mosca es la misma que las probabilidades previas de que un águila caiga o no y es independiente. El hecho de que el águila haya caído en siete moscas consecutivas no aumenta la probabilidad de que el águila haya caído en la décima mosca.
Sofia made 10% of her free throws over the season. If she shot 160 free throws, how many did she make?
Answer:
16
Step-by-step explanation:
160 * 10% = 16
160 * 0.1 = 16
HOW PLEASE EXPLAIN TOO WITH ANSWER
Answer:
y = -2x + 3
Step-by-step explanation:
5 x -2 + 3 = -7
3 x -2 + 3 = -7
9 x -2 + 3 = 1
-3 x -2 + 3 = 9
You just have to test all of the options, everything, out and pick what fits.
Hope that helps!
Question 1 of 5
What is the circumference of a circle with a diameter of 6 feet? Use 3.14 for tt.
A. 18.84 ft
B. 28.26 ft
C. 37.68 ft
D. 9.42 ft
Answer:
The answer is A. 18.84
Step-by-step explanation:
Hope this helps =)
show your work plzzz i will give you the points
Answer:
I do not see a problem.
Step-by-step explanation:
Thanks for the points.
SI UN NUMERO SE MULTIPLICA POR 7, EL RESULTADO ES IGUAL AL NUMERO AUMENTADO EN 24. ¿ CUAL ES EL NUMERO? 7 . X : X + 24
Answer: El número es 4.
Step-by-step explanation:
Sea X un número.
Acá tenemos:
"Si un número se multiplica por 7"
Esto se escribe como 7*X
"... El resultado es igual al número aumentado en 24"
Esto lo podemos escribir como:
7*X = X + 24
Ahora debemos resolver esta ecuación para X.
7*X = X + 24
Primero, debemos llevar todos los términos con X al mismo lado de la ecuación, para hacer esto, podemos restar X en ambos lados:
7*X - X = (X + 24) - X
6*X = 24
Ahora debemos dividir ambos lados por 6.
6*X/6 = 24/6
X = 4
El número es 4.
solve for x and find x
Answer:
x = 24
Step-by-step explanation:
Because this shape is a parallelogram, the line segment measuring 6x must be equal to the line segment on the other side of E, which measures 144 units. 144 ÷ 6 = 24
help PLEASE!!! [URGENT]
Use the Pythagorean theorem to find the distance from Emma’s house to the pool.
Pythagorean theorem: [tex]a^{2} +b^{2} =c^{2}[/tex]
When rewritten for coordinates plane:
[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]
where d is distance and (x,y) are the points.
Write down the coordinates of Emma's house and The Pool.
It is (-5,-3) and (2,2).
Substitute the numbers.
[tex]d=\sqrt{(2-(-3))^{2}+(2-(-5))^{2}}[/tex]
Calculate.
[tex]d=\sqrt{(5)^{2}+(7)^{2}}[/tex]
You should get [tex]\sqrt{74}[/tex] as your answer.
If the sum of the measures of the three angles shown is 163°, what is the measure of ZCEB? I need help ASAP!!!!
Answer:
24 degree
Step-by-step explanation:
sum of all three angles = 163
x + 4x + 2x + 5 - 10 = 163
7x - 5 = 163
7x = 163 + 5
x = 168/7
x = 24
Answer:
24 degree
Step-by-step explanation:
Which expression is equivalent to |a|≤5 ?
a ≥ –5 or a ≤ 5
a ≥ –5 and a ≤ 5
a ≤ –5 and a ≥ 5
a ≤ –5 or a ≥ 5
Answer:
The answer would be a>-5 or a< 5
Step-by-step explanation:
I hope this helps, let me know if i'm incorrect
I have to solve this
4x-5=2-x
Answer:x=7/5
Step-by-step explanation:
Answer:
x= [tex]\frac{7}{\\5}[/tex]
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
4x−5=2−x
4x+−5=2+−x
4x−5=−x+2
Step 2: Add x to both sides.
4x−5+x=−x+2+x
5x−5=2
Step 3: Add 5 to both sides.
5x−5+5=2+5
5x=7
Step 4: Divide both sides by 5.
[tex]\frac{5x}{5}[/tex] = [tex]\frac{7}{5}[/tex]
help!!!!!!!!
5x^2 - 35x+50/x^2-x-20
also here is something cute.......... a munchkin cat
Answer:
funny
Step-by-step explanation:
funny
use the communitive property of addition to rewrite 3 + 5 + 7. Which expression is equivalent?
Answer: 8+7
Step-by-step explanation: 3+5+7 is equivalent to 8+7 because if you add the both of them you’ll get the same exact answer which is 15
SOMEONE PLEASE HELP ME AND ANSWER THIS QUESTION CORRECTLY I WILL MAKE YOU THE BRAINLIEST, GIVE YOU A GOOD RATE, PLEASE ASWER THIS ASAPPPPPPPPP!!!!!!!!!!! I NEED HELP ASAPPPPPPPPPPP!!!!!!!!!!
Answer:
30 10 4
Step-by-step explanation:
Give Brainliest
Marlye asked students in her school whether they prefer scary movies or comedies she found out that 35 students liked scared movies and 65 likes comidies what percent prefier scary movies
Answer:Percentage of students who prefer scary movies =35%
Step-by-step explanation:
Number of students who prefer scary movies= 35
Number of students who love comedies= 65
Total number of students = 65 +35= 100
Percentage of students who prefer scary movies = Number students who prefer scary movies/ total number of students x 100
35/ 100 x 100
0.35 x 100= 35%
Which equation represents the line that passes through the point (1, 5) and has a slope of -2?
Answer:
y=-2x+7
Step-by-step explanation:
y-y1=m(x-x1)
y-5=-2(x-1)
y=-2x+2+5
y=-2x+7
On a coordinate map of Melville, a restaurant is located at (-6,-5). A laundry business is located 3 units to
the left of the restaurant on the map.
What are the map coordinates of the laundry business?
The coordinates of the laundry business are
Answer:
(-9, -5)
Step-by-step explanation:
Having trouble solving this:
Answer:
option c.
1/100
.........................
Answer:
0.01= [tex]\frac{1}{100}[/tex]
banda ayudenme con este punto de una tarea es sobre la sustracción de números enteros
19 - ( - 12 )
- 6 - ( - 27 )
( -18 ) - 4
( - 82 ) - 9
18 - ( - 2 )
( - 12 ) - ( - 11 )
LA RESPUESTA YA LA SE LO Q NECESITO ES EL PROCEDIMIENTO!! gracias :3
Answer:
Step-by-step explanation:
19-(-12)=19+12=31
-6-(-27)=-6+27=21
(-18)-4=-18-4=-22
(-82)-9=-82-9=-91
18-(-2)=18+2=20
(-12)-(-11)=-12+11=-1
a milk tank at a a dairy farm has the form of a rectangular prism. The tank is 3.5 feet wide. The width of the tank is 5/7 of its length and the height is 4/5 of its width. How many cubic feet of milk can the tank hold. How many pounds of milk can it hold if 1 cubic foot of milk weights 66.5 lb
Answer:
17.5 cubic feet
1163.75 pounds
Step-by-step explanation:
Givens
L = 3.5 Given
W = 5/7 * 3.5 Divide by 7
W = 5 * 0.5 Combine
W = 2.5
H = 4/5 * w
H = 4/5 * 2.5
H = 4 * 0.5
H = 2
Volume
V = L * w * h
V = 3.5 * 2.5 * 2
V = 17.5
Weight
1 Cubic foot Milk = 66.5 pounds
17.5 cubic feet milk = x
1 / 17.5 = 66.5/ x
x = 17.5 * 66.5
x = 1164.75
Answer:
1163.75lbs
Step-by-step explanation:
is 14/18 greater then, less then, or equal to 7/9
Answer:
Equal to
Step-by-step explanation:
14/18 is just 7/9 but with the numerator and denominator multiplied by 2
Answer:
equal to
Step-by-step explanation:
14/18 simplified is 7/9
so 7/9=7/9
Evaluate the expression for the given value of the variable.
6 × (h + 4) for h = 3
The answer is
Answer:
42
Step-by-step explanation:
6*(3+4)6*7
42
Answer:
42
Step-by-step explanation:
[tex]6 \times 3 + 6 \times 4 \\ 18 + 24 = 42[/tex]
Which coordinates represent a translation of B(1, 2) 3 units to the left and 2 units up?
B′(–2, 0)
B′(–2, 4)
B′(4, 4)
B′(4, 0)
Answer:
(-2,4)
Step-by-step explanation:
B(1,2)
(x-3, y+2)
1-3=-2
x=(-2)
2+2=4
y=4
Hope this helps! :)
Answer:
B'(-2, 4)
Step-by-step explanation:
If it goes 3 units left, that means you're doing x - 3.
If it goes 2 units up that means you're doing y + 2 This would be:
(1 - 3, 2 + 2)
(-2, 4)
Are 4x and 15 + x equivalent expressions? EXPLAIN
I need help FAST!
Answer:
x=5
Step-by-step explanation:
Step 1: you want to have x alone on one side so I will subtract one x from both sides (to remove the 1 x on the right side). Now we're left with 3x=15.
Step 2: Divide both sides by 3 (to remove the 3 in front of 3x). Now we have x=5.
Help please answer fast!!!
Answer: -3.5
Step-by-step explanation:
tell if im wrong
Answer:it would be 7.5
Step-by-step explanation:-2.5 + 2.5 = 0 0+2.5=2.5 2.5+2.5=4.5 so it would be 2.5+2.5+2.5=7.5
Which statement is true about the slope of the graphed line?
A. The slope is negative
B. The slope is positive
C. The slope is zero
D. The slope is undefined
Answer:
The answer is B, the slope is positive.
Answer: B, the slope is positive.
Step-by-step explanation:
The slope is positive because it is going upwards from left to right.