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adoni [48]
3 years ago
14

How do i find the standard deviation of test scores

Mathematics
2 answers:
user100 [1]3 years ago
4 0

Answer:

Step-by-step explanation:

Solve for the mean (average) of the five test scores.

Subtract that mean from each of the five original test scores. Square each of the differences.

Find the mean (average) of each of these differences you found in Step 2.

Take the square root of this final mean from #3. This is the standard deviation.

dem82 [27]3 years ago
4 0

Answer:

Look up your score on the web

Example: go to the web and enter 34/41 letter grade

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Solve the system by the elimination method. -2x + y + 6 = 0 2x + y - 8 = 0 When you eliminate x, what is the resulting equation?
Natali5045456 [20]

For this case we have the following system of two equations with two unknowns:

-2x + y + 6 = 0\\2x + y-8 = 0

Adding both equations we have to eliminate the variable "x":

y + y + 6-8 = 0

Adding common terms, keeping in mind that different signs are subtracted and the sign of the major is placed:

2y-2 = 0\\2y = 2

Answer:

2y = 2

Option A

5 0
3 years ago
Find the x and y intercept of <br> -x-4y=16.
GREYUIT [131]
The answer is going too be -4 or you can write it as (0,-4) I think
5 0
3 years ago
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Mr. Smith's $85,000 condominium is assessed at 35% of value. The tax rate is $2.70 per $100 of value. If the tax increases $.35
wel

Answer:

$907.38

Step-by-step explanation:

We have been given that Mr. Smith's $85,000 condominium is assessed at 35% of value.

First of all, we will find 35% of $85,000 as shown below:

\frac{35}{100}\times \$85,000

35\times \$850

\$29,750

We are also told that the tax rate is $2.70 per $100 of value. Now we will divide $29,750 by 100 as:

\frac{\$29,750}{\$100}=297.50

Since the tax rate is increased by $0.35 per $100 of value, so the new tax rate will be $2.70 plus $0.35.

\text{New tax rate}=\$3.05

\text{Amount of new tax}=\$3.05\times 297.50

\text{Amount of new tax}=\$907.375

\text{Amount of new tax}\approx \$907.38

Therefore, Mr. Smith's new tax will be $907.38.

4 0
3 years ago
A rectangle has a length of 2 6√<br> and width of 6√<br> . Find the perimeter of the rectangle.
Angelina_Jolie [31]
  • L=2root6
  • B=root6

\\ \rm\Rrightarrow Perimeter=2(L+B)

\\ \rm\Rrightarrow Perimeter=2(2\sqrt{6}+\sqrt{6})

\\ \rm\Rrightarrow Perimeter=2(3\sqrt{6})

\\ \rm\Rrightarrow Perimeter=6\sqrt{6}

8 0
2 years ago
Read 2 more answers
ALGEBRA<br> 5h+2(11-h)=-5
tangare [24]
5h + 2(11-h) = -5

5h +2*11 +2*(-h) = -5

5h +22 -2h = -5

3h + 22 = -5

3h = -5 -22

3h = -27

------

Therefore:

h=(-9), as 3 *(-9) = -27
7 0
3 years ago
Read 2 more answers
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