Answer:
the anwser is 12.5 i did this question on a test last week
Elena would like to know the average height of seventh graders in her school district. She measures the heights of everyone in a random sample of 20 students. The mean height of Elena’s sample is 61 inches, and the MAD (mean absolute deviation) is 2 inches.
Select all the true statements.
Who every can answer this I will give brainliest!! Please help!
Complete question is;
Elena would like to know the average height of seventh graders in her school district. She measures the heights of everyone in a random sample of 20 students. The mean height of Elena's sample is 61 inches, and the MAD (mean absolute deviation) is 2 inches.
Select all the true statements. Make your selections bold.
A. The median height of the sample must be between 59 and 63 inches.
B. Another random sample of 20 students is likely to have a mean between 57 and 65 inches.
C. The mean height of these 20 students is likely to be the same as the mean height of all students in the district.
D. The mean height of these 20 students is likely to be the same as the mean height of a second random sample of 20 students.
E. Elena would be more likely to get an accurate estimate of the mean height of the population by sampling 40 people instead of sampling 20 people.
Answer:
Options A, B & E are true.
Step-by-step explanation:
We are told that Elena's mean absolute deviation is 2 inches.
This means that the distance between each data point and the mean is equal to 2. This value gives us a good idea about the variability present in the dataset.
This is calculated from the difference between the mean of the absolute value of the initial mean and each data set.
Now, looking at the options. In option A, since mean height of the 20 students is given as 61, it means the median will be close to that figure too. Thus, between 59 and 63 inches given is appropriate.
In option B, if another random sample is taken, the mean would likely be close to 61 too since the MAD is 2.
Thus range given is okay.
In options C & D, there is no evidence to prove that the new mean would be the same as the district or the second random sample. This, both options are not appropriate.
In option E, if she uses a Sample of 40, she will obviously get a more accurate figure because the more the sample the more accurate the average result that represents the population.
what is the radius of the circle which has the given equation? (x - 2)2 + (y + 1)2 = 16
Answer:
r = 4units
Step-by-step explanation:
The standard foem of equation of a line is expressed as;
(x-a)² + (y-b)² = r²
r is the radius
Compare with the given equation (x - 2)^2 + (y + 1)^2 = 16
r² = 16
r = √16
r = 4
Hence the radius of the circle is 4
15y - 2y + 29 = 5y -27
Answer:
y=-7
Step-by-step explanation:
Answer:
8y=-56
Step-by-step explanation:
Subtract 15y-2y
after you get 13y subtract 5y which is 8y
afterwards subtract -29-27 which is addition and you get -56
y=-7
find the volume of the prism
Answer:
volume = 108
Step-by-step explanation:
simple: volume = base x height
9 x 12 = 108
Answer 1452
Step-by-step explanation:
im not sure if im correct but the formua is V = L x W x H which is volume equal lenth multiplied by with multiplied by height. so 12 x 11 x 11
35% of a number is what fraction of that number?
Your answer should be
a simplified proper fraction, like 3/5
a simplified improper fraction, like 7/4
Answer:
7/20, that's what my calculator says, hope this helps
Step-by-step explanation:
help help help i’ll kiss u
Answer:
i want my kiss first
Step-by-step explanation:
MRK ME BRAINLIEST PLZZZZZZ
HELP PLZ URGENT!HELP PLZ URGENT!HELP PLZ URGENT!HELP PLZ URGENT!HELP AGAIN
Answer:
13 is the answer i think try it out
Help asap plz and thank you
Answer:
A
Step-by-step explanation:
z, duehdhdhd 2747 36veuend
Please Answer these ASAP Find the area.
1. Determine the value of the bases, b and B, used to determine the volume in the object below.
2. Find the area. The polygon is regular. Round answer to the nearest tenth
Answer:
polygon is regular. Round answer to the nearest tenth
Step-by-step explanation:
[tex]36 - 6 \times = \frac{ < \sqrt{ \geqslant \binom{ | |4)6300 \times - 9x55.90660606.. \sqrt{. \geqslant 522 \sqrt[25h \\ ]{?} \times \frac{?}{?} \times \frac{?}{?} } | | \times \frac{?}{?} }{?} } }{?} \times \frac{?}{?} [/tex]please view the image below to help solve thank youu
determine whether the scenario involves independent or dependent events then find the probability
Answer:
B
Step-by-step explanation:
1/4 x 1/4
independent because if you flip a tails on the first toss it doesn't affect the second toss
What is a formula for the nth term of the given sequence? -4, 4, 12
Can someone help me with this it's multiple answers
Answer:
all the answers are correct
Step-by-step explanation:
2 times 2 times 3 times 3 =36
2 times 3 times 2 times 3 = 36
2 times 9 times 2 = 36
2 times 2 times 9 = 36
I need help with geometry
Answer:
[tex]Points ~that ~lies~on ~the~sides~of ~the~triangle.[/tex]
[tex]A)~(a,0)[/tex][tex]D)~\frac{a}{2}=\frac{b}{2}[/tex]---------------------------
hope it helps...
have a great day!!
Answer:
Options A and D will be your answers
Step-by-step explanation:
hope it helps you...
Suppose f(x) = x2 and g(x) = Which statement best compares the
graph of g(x) with the graph of f(x)?
A. The graph of g(x) is vertically compressed by a factor of 2.
B. The graph of g(x) is horizontally compressed by a factor of 2.
C. The graph of g(x) is horizontally stretched by a factor of 2.
D. The graph of g(x) is shifted 2 units to the right.
Answer: I think it’s B
Step-by-step explanation:
Sry if wrong pls don’t be mad.
Find the circumference of the circle. Use 3.14 !! (No link)
Answer:
62.8 ft
Step-by-step explanation:
Given,
Diameter = 20 ft ( from the diagram )
pi = 3.14
To find : Circumference ( circle ) = ?
Radius ( r )
= Diameter / 2
= 20 / 2
= 10 ft
Formula : -
Circumference ( circle ) = 2 pi r
Circumference ( circle )
= 2 x 3.14 x 10
= 2 x 31.4
= 62.8 ft
I don't understand how to factor out the GCF of the polynomial
[tex]4x^{2} -8x-6[/tex]
Which shape has a perimeter of 18 inches?(1 point)
Answer:
d
Step-by-step explanation:
Differentiate 2x-4x^4
Answer:
2-16x^3
Step-by-step explanation:
Oak Street and Elm Street run parallel to each other. When Main Street
intersects them, it forms interior 4, measuring 35°. What is the measure of
6?
Answer: D. 145
Step-by-step explanation: Angle 6+ 35 = 180. 180-35= 145. Angle 2 and Angle 6 are congruent and Angle 2 and Angle 4 make up a line of 180 degrees.
Answer:
D
Step-by-step explanation:
correct 2.67754 to two decimal places
Find the arc length of the partial circle.
Either enter an exact answer in terms of T or use 3.14 for pie and enter your answer as a decimal.
units
Answer:
Arc length
[tex]2\pi \times 8 \times \frac{90}{360} \\ 4\pi[/tex]
Write an inequality that represents eight less than three times a number is more than 22.
3x-8>22
hope this helps!
20% of $80 and add it to the original amount!
Answer:
96
Step-by-step explanation:
20 percent of 80 is 16, and added to 80 would equal 96
Find x rounded to the nearest while number
Answer:
10.35
Step-by-step explanation:
The given triangle is a right angled ∆ .The data given is ,
Base = x Hypontenuse = 23 Angle = 63° .We can use ratio of cosine here , as ,
=> cos∅ = b/h
=> cos 63° = x/23
=> 0.45 = x/23
=> x = 23 × 0.45
=> x = 10.35
Hence the value of x is 10.35What is the height of the pyramid?
Answer:
4
Step-by-step explanation:
The slant height of the pyramid is marked as 5. If we drew and auxiliary 2D right triangle in the pyramid, this slant height would be the hypotenuse and one of the legs would be the height of the pyramid. The base leg would be equal to half of a side of the pyramid (3). Therefore, we can use the Pythagorean theorem to find the height ([tex]h[/tex]):
[tex]3^2+h^2=5^2,\\h^2=16,\\h=\boxed{4}[/tex]
ano ang dapat tandaan sa pagbuo ng plano ng proyekto
Answer: kung ano ang dapat tandaan ay na kailangan mong makuha ang bawat detalye at gawin ang mga bagay na mabagal upang hindi ka makaligtaan anything. Pinaka utok pls
Step-by-step explanation:
15 pts, Trigonometic ratios. Please solve as it says on the mandate, Thanks!
Answer:
WY = 8
Step-by-step explanation:
We solve for above question using the Trigonometric function of Sine
sin θ = Opposite/Hypotenuse
Opposite = WY = x
Hypotenuse = 9
θ = 63°
Hence,
sin 63° = x/9
Cross Multiply
x = sin 63° × 9
x = 8.0190587177
Approximately x = 8
Therefore, WY = 8
Two sides of a right triangle measure 2 units and 4 units.
4 units
2 units
What is the area of the square that shares a side with the third side of the triangle?
units?
What x and y equal to
Answer:
X = 4, Y = 3.
Explanation:
Since the length of side CK is equal to the length of WM, then you can make the equation 6y-4 = 18. then you just add 4 to each side and divide both sides by six to get 3. Same thing for the other equation. Angle (i think its an angle due to its placement) C is equal to angle M, so you can make the equation 3x + 7 = 19. Subtract seven from both sides then divide by 3 to get 4. Tell me if you have any questions :)
Answer and Step-by-step explanation:
We know the triangles are congruent, so if you were to flip one of the triangles onto the other, the will perfectly match up, allowing us to solve for x and y.
19 = 3x + 7
Subtract 7 from both sides.
12 = 3x
Divide each side by 3.
4 = x
14 = 6y - 4
Add 4 to each side.
18 = 6y
Divide each side by 6.
3 = y
x = 4
y = 3
#teamtrees #PAW (Plant And Water)
A newspaper editor wants to know whether people who buy the newspaper like the paper’s new format. He prints an alphabetical list of all the employee names and asks every fifth person on the list. Is the sample likely to be biased or unbiased? Explain your answer.
Answer:
I know that's it's Biased but I can't fully get my answer out.
I beleive its biased because he is only asking those who works for the newspaper but every fifth person
I think this answer was help you