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BARSIC [14]
4 years ago
3

A school has 5000 students. There are 1500 freshman, 1500 sophomores, 1000 juniors, and 1000 seniors. At 8:00 AM, all students a

re in class; there are 200 classes that each have 25 students. The administration wants to give a survey asking the students about their favorite classes. They wish to poll 100 students. The entire student body is assigned a number, and then a random number generator is used to select 100 of those numbers at random. The students matching those numbers are given the survey. What sampling method was used?
Mathematics
1 answer:
MariettaO [177]4 years ago
6 0

Answer:

Simple random sample

Step-by-step explanation:

Notice the words the entire student body is assigned a number. Everyone has an equal random chance of being selected (random number generator used) The other details about subdivisions of classes, I think was there just to be tricky.

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the areas of the world's oceans are listed in the table order the oceans according to their area from least to greatest.
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Pacific ocean is the biggest ocean
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4 0
3 years ago
Answer quickly please
KIM [24]

The correct answer is C.


You can tell this by factoring the equation to get the zeros. To start, pull out the greatest common factor.


f(x) = x^4 + x^3 - 2x^2


Since each term has at least x^2, we can factor it out.


f(x) = x^2(x^2 + x - 2)


Now we can factor the inside by looking for factors of the constant, which is 2, that add up to the coefficient of x. 2 and -1 both add up to 1 and multiply to -2. So, we place these two numbers in parenthesis with an x.


f(x) = x^2(x + 2)(x - 1)


Now we can also separate the x^2 into 2 x's.


f(x) = (x)(x)(x + 2)(x - 1)


To find the zeros, we need to set them all equal to 0


x = 0


x = 0


x + 2 = 0

x = -2


x - 1 = 0

x = 1


Since there are two 0's, we know the graph just touches there. Since there are 1 of the other two numbers, we know that it crosses there.

4 0
4 years ago
Read 2 more answers
To find the interquartile range you need to ____the upper and lower quartile values.​
Blababa [14]

Answer:

The correct options are: Interquartile ranges are not significantly impacted by outliers. Lower and upper quartiles are needed to find the interquartile range. The data values should be listed in order before trying to find the interquartile range. The option Subtract the lowest and highest values to find the interquartile range is incorrect because the difference between lowest and highest values will give us range. The option A small interquartile range means the data is spread far away from the median is incorrect because a small interquartile means data is nor spread far away from the median

8 0
3 years ago
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Chelsea invested $5600 at a rate of 3.6% compounded quarterly. Write a compound interest function to model the situation. Then f
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3 years ago
Solve the equation<br>-2x + 1 = -4x + 9<br>x=​
Vinil7 [7]

Answer:

x = 4

Step-by-step explanation:

Step 1: Write equation

-2x + 1 = -4x + 9

Step 2: Solve for <em>x</em>

  1. Add 4x to both sides: 2x + 1 = 9
  2. Subtract 1 on both sides: 2x = 8
  3. Divide both sides by 2: x = 4

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

-2(4) + 1 = -4(4) + 9

-8 + 1 = -16 + 9

-7 = -7

8 0
4 years ago
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