1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
padilas [110]
3 years ago
13

How to calculate standard deviation given mean and sample size?

Mathematics
1 answer:
ad-work [718]3 years ago
3 0
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
You might be interested in
4 groups of 5 hundredths
Fudgin [204]
5/100 * 4 = 20/100 reduces to 1/5
4 0
3 years ago
The regular nonagon has rotational symmetry of which angle measures? Check all that apply. 40° 45° 120° 240° 260° 320°
Neporo4naja [7]

Hi!

To find the semmetry between the nonagon just do this:

360 / 9 = 40

The regular nonagon has rotational symmetry of 40 degrees!

3 0
3 years ago
Read 2 more answers
If triangle DEF is an isosceles triangle with DE is congruent to EF, find x and the measure of each side
Rudik [331]

Step-by-step explanation:

Given that,

DE = 8x - 13

EF = 5x + 17

DF = x + 21

Also,

DE = EF

which means that,

8x - 13 = 5x + 17

8x - 5x = 17 + 13

3x = 30

x = 30/3

x = 10

Now,

DE = 8x - 13 = 8×10 - 13 = 80 - 13 = 67cm

EF = 5x + 17 = 5×10 + 17 = 50 + 17 = 67cm

DF = x + 21 = 10 + 21 = 31cm

3 0
2 years ago
Are G and F mutually exclusive events? Explain. G and F are mutually exclusive because if you are not a finalist, then you canno
Alika [10]

Answer: G and F are mutually exclusive because they cannot occur together

Step-by-step explanation:

According to the definition of mutually exclusive events,

The events which can not occur together and probability of them occurring together is 0 are known as mutually exclusive events.

The first statement gives an implication that if one happens then other happens meaning they could both still happen so it is not true.

The second statement contradict the question about being mutually exclusive events.

The third statement also is a implication that if one event occurs then other does or does not occur.

The last statement is correct one that conforms with the question and obeys the definition of mutually exclusive events.

8 0
2 years ago
A+restaurant+bill+before+tax+is+$15. 50. +if+the+sales+tax+is+8%+and+a+15%+tip+is+added,+what+is+the+total+cost+of+the+meal?
ZanzabumX [31]

Answer:

$19.07

Step-by-step explanation:

Look at image above...

7 0
1 year ago
Other questions:
  • A store sells four-packs of permanent markers in assorted colors for $3.19 per pack. All spiral-bound notebooks, whether wide-ru
    8·2 answers
  • If a = 5, b = 5 and c = 10, what is the value of ac / 2b ?
    11·1 answer
  • Help with the question below
    9·1 answer
  • How do you graph a circle x^2 + y^2=25 and the line is given y=2
    15·1 answer
  • What property is used to find (9-7)(5)=2(n)
    6·1 answer
  • How would you graph the result of -3 + 5 as a point on the number line?
    8·2 answers
  • Helpppp me pleaseeeeeeeeeee
    9·1 answer
  • Sophia uses 334 cups of flour for each cake she makes. She has a 10-pound bag of flour that costs $8.79 and contains 152 quarter
    12·1 answer
  • According to the National Education Association (NEA), teachers generally spend more than 40 hours each week working on instruct
    12·1 answer
  • Question 10 of 10
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!