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makvit [3.9K]
2 years ago
7

Tyler wonders what proportion of students at his school would dye their hair blue if their parents would let them. He surveyed a

random sample of 10 students at his school, and 2 of them said they would. Kiran didn’t think Tyler’s estimate was very accurate, so he surveyed a random sample of 100 students, and 17 of them said they would.
Based on Tyler's sample, estimate what proportion of the students would dye their hair blue.______

Based on Kiran's sample, estimate what proportion of the students would dye their hair blue.______

Whose estimate is more accurate? Type Tyler or Kiran.______
Mathematics
1 answer:
pshichka [43]2 years ago
8 0

Using the proportion concept, it is found that:

  • According to Tyler's sample, the estimate is of 0.2 = 20%.
  • According to Kyran's sample, the estimate is of 0.17 = 17%.
  • Due to the higher sample size, Kyran's estimate is more accurate.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and larger sample sizes lead to more accurate predictions.

In Tyler's sample, 2 out of 10 students would dye their hair blue, hence:

p = 2/10 = 0.2.

In Kiran's sample, 17 out of 100 would, hence:

p = 17/100 = 0.17.

Due to the higher sample size, as 100 > 20, Kyran's estimate is more accurate.

More can be learned about proportions at brainly.com/question/24372153

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Answer: E,C and D

Step-by-step explanation:

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3 years ago
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Karen is working on her math homework. She solves the equation
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3 years ago
Graph a line that contains the point (-5,-3) and has a slope of -2
Tpy6a [65]

Answer:

-->

Step-by-step explanation:

Graph (-5,-3) and use the slope, -2, to find another point. -2 can also be written as -\frac{2}{1}

\frac{rise}{run} =\frac{-2}{1} and  \frac{rise}{run} =\frac{2}{-1} **

Use both. This works because either way, they will lie on the same line with the same slope. So, starting at (-5,-3), go down two points (-)* and to the left 1 (+)*, then, starting at (-5,-3) again, go up two points (+)* then to the right 1 point (-)*.

* If the number is negative, you either go down or to the right. If the number is positive, you go up and to the left.

**Rise over run refers to the change in the y-axis and the change in the x-axis: \frac{rise}{run} =\frac{y-axis}{x-axis}. Only one number is negative because, if both were negative, that would make a positive number, but the slope is -2, not 2.

Another way you could do this is by finding points first. All you need to do is turn the slope into a "point". Remember, 2 is the y and 1 is the x:

-2=-\frac{2}{1} = (1,-2) and (-1,2)

Then, using (-5,-3) and your new points, add them separately:

(-5,-3)+(1,-2)\\(-5+1,-3+(-2))\\(-5+1,-3-2)\\(-4,-5)

(-4,-5) is one point

(-5,-3)+(-1,2)\\(-5+(-1),-3+2)\\(-5-1,-3+2)\\(-6,-1)

(-6,-1) is another point. Connect the three points. You can check your work on the graph:

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3 years ago
Solve equation and write reason for each step x+25=45
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just do 45-25= x

x= 20

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3 years ago
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3(x+6)=2(4x+14)<br> what is the value of x?
GrogVix [38]
Hi there

3(x + 6) = 2(4x + 14)
3x + 18 = 8x + 28
3x - 8x = 28 - 18
-5x = 10
x= 10/-5
x = -2


Here it is :)


Merry Christmas

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3 years ago
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