In addition to mean and sample size you will need the individual scores.
The formula for standard deviation is:
S^2 = E(X-M)^2/N-1
Here's an example:
Data set: 4,4,3,1
Mean: 3
Sample size: 4
First, put the individual scores one after the other and subtract the mean from it.
4 - 3 = 1
4 - 3 = 1
3 - 3 = 0
1 - 3 = -2
Second, square the answers you got from step 1.
1^2 = 1
1^2 = 1
0^2 = 0
-2^2 = 4
Third, plug the values from step 2 into the formula.
S^2 = (1+1+0+4)/(4-1) = 6/3 = 2
Standard deviation = 2
-3(x+(3))^2-4 is the answer
if its asking you to round then D
Step-by-step explanation:..........................................................................................
Hello and Good Morning/Afternoon:
<u />
<u>To find the slope of something</u>:
⇒ let's consider what the formula of the slope needs

⇒ <em>needs</em> any two points on the line (x₁,y₁) and (x₂,y₂)
<u>Let's get the required information</u>:
<u>Let's solve</u>:

<u>Answer: 2/5</u>
<u></u>
Hope that helps!
#LearnwithBrainly
What kind of math problems?