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Brums [2.3K]
4 years ago
10

A student in a statistics class asks students in a long lunch line about their opinions about the school cafeteria. The sample t

hat results is most likely __________________.
A. quota
B. symmetric
C. large
D. biased
Mathematics
1 answer:
Paladinen [302]4 years ago
7 0

Answer:

The correct option is;

D. Biased

Step-by-step explanation:

A sampling method in which the members of the sample are not representative of the population, such that some members of the population have a higher or lower probability within the sample which is indicative that not all members of the population are sampled

A biased sample is a non random sample and the can lead to misleading data conclusion

In the question, the sampling of student opinion about the school cafeteria among students who are on the lunch line and so prefer the school cafeteria leaves out the portion of the population that get their lunch from alternative sources.

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The graph of y^2=x^2 is symmetric with respect to which axis? a. x-axis c. both b. y-axis d. neither
PtichkaEL [24]

Answer:

c. both

Step-by-step explanation:

Given equation is y^2=x^2

Now we need to check if the graph of  y^2=x^2 is symmetric with respect to which axis?

a. x-axis c. both b. y-axis d. neither

We know that if f(-x) reflect the graph about y-axis

so let's change x by -x into given function to see if that equation remains unchanged or not

y^2=(-x)^2

y^2=x^2

That is same as previous equation.

<u>Hence given graph is symmetric about y-axis.</u>

We know that if -f(x) reflect the graph about x-axis

so let's change y by -y into given function to see if that equation remains unchanged or not

(-y)^2=x^2

y^2=x^2

That is same as previous equation.

<u>Hence given graph is symmetric about x-axis.</u>

So the correct choice is c. both

3 0
3 years ago
Read 2 more answers
3/10 + 3/100 equals _ /100
sesenic [268]
Get a common denominator. 

3/10 = 30/100 

30/100 + 3/100 = 33/100

Answer: 33/100
7 0
3 years ago
Read 2 more answers
3/5 ton elmanın 1/4'ü satılmıştır. Buna gore geriye kaç kilogram elma kalmiştır?
Troyanec [42]

Cevap:

450 kilo

Adım adım açıklama:

Verilen:

Toplam elma tonu = 3/5 ton

Satılan kısım = 1/4 ton

Tonlarca elma kaldı;

(Toplam ton - satılan ton)

Satılan ton:

Satılan kısım * toplam ton

(1/4 * 3/5) ton

3/20 ton

Ton kaldı:

Toplam ton - satılan ton

(3/5 - 3/20)

L.C.M 5 ve 20 = 20

(12 - 3) / 20

9/20 ton

Tonları kg'a çevirmek:

1 ton = 1000 kg

Bu nedenle

9/20 ton = (9/20) * 1000

= 9000/20

= 450 kg

5 0
3 years ago
Factor out the greatest common factor. 2xy - 12y + 6wy
Fed [463]
2y(x-6+3w)

That's what it would look like factored
4 0
4 years ago
If z and w are complex numbers w = a+bi and z = c+di<br><br> Prove algebraically that |zw| = |z||w|.
-Dominant- [34]

Answer:

To show that \lvert zw\rvert =\lvert z\rvert \lvert w\rvert observe that:

Step-by-step explanation:

We have that w=(a+bi), z=(c+di). Then zw=(c+di)(a+bi)=(ac-bd)+(cb+ad)i. Now, the absolute value of this product is \lvert zw \rvert =\sqrt{(ac-bd)^{2}+(cb+ad)^{2}}=\sqrt{a^{2}c^{2}-2acbd+b^{2}d^{2}+c^{2}b^{2}+2abcd+a^{2}d^{2}}=\sqrt{a^{2}c^{2}+b^{2}d^{2}+c^{2}b^{2}+a^{2}d^{2}}.

On the other hand, \lvert z\rvert =\sqrt{c^{2}+d^{2}} and \lvert w \rvert =\sqrt{a^{2}+b^{2}}. Then,

\lvert z\rvert \lvert w \rvert =\sqrt{c^{2}+b^{2}}\sqrt{a^{2}+b^{2}}=\sqrt{(c^{2}+d^{2})(a^{2}+b^{2})}=\sqrt{c^{2}a^{2}+c^{2}b^{2}+d^{2}a^{2}+d^{2}b^{2}}

Then, it is clear that  \lvert zw \rvert =\lvert z\rvert \lvert w \rvert.

7 0
4 years ago
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