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ZanzabumX [31]
2 years ago
10

The final exam grade distribution for all students in the introductory statistics class at a local community college is displaye

d in the table, with A = 4, B = 3, C = 2, D = 1, and F = 0. Let X represent the grade for a randomly selected student from the class.
What is the standard deviation of the distribution?


A) 1.16

B) 1.08

C) 1.41

D) 2.98

Mathematics
2 answers:
Eddi Din [679]2 years ago
4 0
The answer is B I know this
PolarNik [594]2 years ago
3 0

Answer:

B

Step-by-step explanation:

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Find sin 0, where is the angle shown.<br> Give an exact value, not a decimal approximation.
Nata [24]

Answer:

\displaystyle \sin\theta=\frac{12}{13}

Step-by-step explanation:

Recall that in a right triangle, sine is the ratio of the opposite side to the hypotenuse:

\displaystyle \sin\theta=\frac{\text{opposite}}{\text{hypotenuse}}

We are actually not given the opposite side in this case. However, since we know the hypotenuse and the adjacent side, we can use the Pythagorean Theorem to find the opposite side. So:

a^2+b^2=c^2

Let <em>a</em> be the adjacent side and <em>b</em> be the opposite side. <em>c</em> will be the hypotenuse.

Substitute:

(5)^2+b^2=(13)^2

Solve for <em>b: </em>

<em />b=\sqrt{169-25}=\sqrt{144}=12<em />

So, the opposite side measures 12.

Then sine will be:

\displaystyle \sin\theta=\frac{12}{13}

3 0
3 years ago
What is the area of the triangle <br> O 20cm<br> O 10cm<br> O 16cm<br> O 17cm
LiRa [457]
The answer is 20cm
Multiply the width and the hight then divid by twi
8 0
3 years ago
Can you please help me out on this...​
ss7ja [257]

Answer:

The answer is either a, b, c, or d.

Step-by-step explanation:

I just chose all answers because i didn't feel like doing more work.

6 0
3 years ago
the perimeter of a square is equal to the perimeter of an equilateral triangle the length of a side of the square is given by th
diamong [38]

Answer:

x = 3

Step-by-step explanation:

We are told that the length of a side of the square is x.

Now, perimeter of square = 4 × side length

Perimeter of square = 4x

Also,we are told that the triangle is equilateral and a side is (x + 1).

Thus, perimeter of triangle = 3(x + 1)

Since we are told that the perimeter of the square is equal to that of the equilateral triangle. Thus;

4x = 3(x + 1)

4x = 3x + 3

Subtract 3x from both sides to get;

4x - 3x = 3

x = 3

5 0
3 years ago
What is the direct variation between x and y when x=10 and y=250
ioda

You can use equations to describe the relationship between the two numbers.

x+240=y

y-240=x


7 0
3 years ago
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