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
zmey [24]
3 years ago
7

Which of the following is the formula used to calculate the variance of a set of data

Mathematics
2 answers:
Sidana [21]3 years ago
8 0

Answer:

he's right, the answer is a

Step-by-step explanation:

den301095 [7]3 years ago
6 0

Answer:

(A) s^{2}=\frac{1}{n-1}\sum_{i}^{n}(x_{i}-\bar{x})^{2}

Step-by-step explanation:

Variance is the expectation of the squared deviation from the mean of x. Variance of the set of data can be discrete, continuous or mixed.

In order to calculate the variance of the set of the provided data, we need x_{i}= Terms in set of data,

\bar{x}= Sample mean

∑= sum,

n= sample size.

The variance can be calculated as:

s^{2}=\frac{1}{n-1}\sum_{i}^{n}(x_{i}-\bar{x})^{2}

where s^{2} is the variance and is always measured in squared units.

The correct formula is option (A),since it consists of summation of the square of the difference of the terms in the data and the mean, also variance is the measure of how far is each value in the given data from the mean, which is the correct formulation of the variance.



You might be interested in
Heidi's friends want to reserve a karaoke studio this weekend. It cost $30 to reserve a room, plus $5 per person for pizza, plus
Ksenya-84 [330]

Answer:

5

Step-by-step explanation

2 + 5 is 7 which equals 1 person 7 x 5 = 35 which means their will be 5 people per group because 30 {room cost} plus 35 is 65

what do i mean?

2 + 5 IS 1 person and 2 plus 5 is 7 so the remaining money they have would be 35 because 65 minus 30 is 35 so i divid 35 by 7 which brings 5 people

6 0
3 years ago
Solve for x:1/2(x-2)+1/3(x-3)+1/4(x-4)
Archy [21]

Answer:

\frac{1}{12}  \times (13x - 36)

4 0
2 years ago
50 POINTS IF YOU ANSWER!!
LekaFEV [45]

Answer:

I think it will be 12x/y

it must help you

5 0
2 years ago
Read 2 more answers
Find the solutions to sin2(x) + cos(x) = 1, keeping 0 ≤ x < 2π
frozen [14]
Sin2(x) +cos(x)=1
from the relation: (sin2(x) +cos2(x) =1 )
so , sin2(x)=1-cos2(x)
by subs. in the main eqn.
1-cos2(x) + cos(x) =1
by simplify the eqn.
cos(x) -cos2(x)=0
take cos(x) as a common factor
cos(x)* (1-cos(x))=0
then cos(x)=0 && cos(x)=1
cos(x)=0 if x= pi/2
& cos(x) = 1 if x = 0 , 2*pi
so the solution is x= {0,pi/2 , 2*pi}
3 0
3 years ago
1/2(x+10)= 1/4 (x-8) x= <br> (must be a fraction)
Alex_Xolod [135]

Answer:

x=-9\frac{1}{3}

Step-by-step explanation:

\frac{1}{2}(x+10)=\frac{1}{4}(x-8)

\frac{1}{2}x+5=\frac{1}{4}x-2

\frac{1}{2}x-\frac{1}{4}x=-5-2

\frac{3}{4}x=-7

x=-\frac{28}{3}=-9\frac{1}{3}

5 0
3 years ago
Other questions:
  • Plllzzz urgent urgent!!!!! 2 to 10 plzzz
    10·2 answers
  • Find the area of the polygon. 12 cm12 cm19 cm The area of the polygon is square centimer
    8·1 answer
  • Someone please help??
    5·1 answer
  • Point G is the center of the small circle. Point X is the
    9·1 answer
  • Choose and appropriate metric unit for the height of a giraffe
    11·1 answer
  • Helpppp please can somebody please explain this to me.
    5·1 answer
  • The set of whole numbers includes ______ and all positive integers
    11·1 answer
  • The area of a circle is 30.85cm2. Find the length of the radius rounded to 2 DP
    5·1 answer
  • 6y-3x=-18 write it in Standard form
    15·1 answer
  • Can anyone please help me asap? thanks in advance.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!