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3 years ago

Identify whether the given value is a statistic or parameter:

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

4 0

Answer:

The value is a statistic, since it is from a sample.

Step-by-step explanation:

If the value is from a population, it is a parameter.

Otherwise, if the value is from a sample, it is a statistic.

In this question:

In a random sample of U.S. households, it was found that 72% have high-speed Internet.

The value is from a sample, so it is a statistic.

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Consider the equation:

Ludmilka [50]

Answer:

x^2 - 6x - 55 = 0

using calculator apply mode 5 3 and write nmbrs

1 , -6 , -55

answers must be 11 and -5

4 0

3 years ago

Are the two parabolas defined below similar or congruent or both? Justify your reasoning. Parabola 1: The parabola with a focus

Dominik [7]

Answer:

They are similar by a factor of 14

Step-by-step explanation:

From the general equation of a parabola opening up (since the directrix is on the y axis and the focus is upwards this line) the focus coordinates are:

$Focus = (h,k+p) = (0,2)$

So h=0 and k+p=2, for the directrix:

$y = k-p=-4$

solving k and p from the two equations above:

$k=-1 and p=3$

So for Parabola 1 the equation would be:

$x^{2} =4*3(y+1)$

For Parabola 2 the general equation is:

$x^{2} =4*(3/2)(y)$

here h=0, k=0, p=3/2 so focus is (0,3/2), directix is y=-3/2, they have the same orientation.

they are not congruent. For them to be similar it must comply:

$x_{1}=k x_{2}\\y_{1}=ky_{2} => (1/12)x_{1} ^{2} -1 = k(1/6)x_{2} ^{2}$

replacing $x_{1}$ and solving for k:

$(1/12)(kx_{2}) ^{2} -1 = k(1/6)x_{2} ^{2}\\ (1/12)k^{2} x_{2}^{2}-1 = k(1/6)x_{2} ^{2}\\k-12 = (12/6)=2\\k = 2+12=14\\$

They are similar by a factor of 14

8 0

3 years ago

Solve for x. 3x−4≤5 Drag and drop a symbol and number into the boxes to correctly complete the inequality.

Lelechka [254]

Answer:

x≤3

Step-by-step explanation:

3x≤5+4

3x≤9

x≤3

4 0

3 years ago

What is 4-2y+(-8y)+6.2 simplified

S_A_V [24]

Answer:

- 10 y+10.2

Step-by-step explanation:

4-2y+(-8y)+6.2

combine like terms

-2y -8y +4+6.2

- 10 y+10.2

3 0

4 years ago

Read 2 more answers

28-22 +2;월 a? -wA, Jaeta<br>, ,<br>3<br>-

MakcuM [25]

Answer:

Sorry what is the equation because i can not read what you put it like you are mixing number with other number that i can not read like this

Step-by-step e

3 0

4 years ago