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
bogdanovich [222]
3 years ago
9

The formula for the standard deviation of a sample is:

Mathematics
1 answer:
timofeeve [1]3 years ago
5 0

Answer:

d. The variance is 9.56 and the standard deviation is 3.09.

Step-by-step explanation:

From the above question, we are given the following data set.

3, 7, 8, 8, 8, 9, 10, 10, 13, 14

a) Mean = 3 + 7 + 8 + 8 + 8 + 9 + 10 + 10 + 13 + 14/ 10

= 90/10

= 9

b) Variance

The formula for sample Variance = (Mean - x)²/ n - 1

Mean = 9

n = 10

Sample Variance =

(3 - 9)² + (7 - 9)² + (8 - 9)² + (8 - 9)² + (8 - 9)² + (9 - 9)² + (10 - 9)² + (10 - 9)² + (13 - 9)² + (14 - 9)² / 10 - 1

= 36 + 4 + 1 + 1 + 1 + 0 + 1 + 1 + 16 + 25/9

= 86/9

= 9.555555556

≈ Approximately 9.56

Variance = 9.56

Sample Standard deviation = √Sample Variance

= √9.56

= 3.0919249667

≈ Approximately 3.09

You might be interested in
Can you guys help me with this question?
IRINA_888 [86]
So below m in the chart, is shows what m equals for you to substitute in the equation

So the second blank would be 42.
Since 7*6=42.

The third blank would equal to 56.
Since 7*8=56
5 0
3 years ago
Determine the value of y.
Anon25 [30]

Answer:

i think it's (C) 4.8

\frac{5}{5+3} = \frac{8}{8 + y}

8 0
3 years ago
Read 2 more answers
HELP ME 35 1/4 + 12 7/12
ZanzabumX [31]
The answer to this question is 48.
7 0
3 years ago
Rectangle area w algebra<br> step by step explanation please :)
Natalija [7]

We know that the area is 20.

Since 20 is a small number: lets list out possible combinations of lengths and widths.

1 * 20

2 * 10

4 * 5

L = 7 + 3w

lets see which on makes sense.

L = 7 + 3w

20 = w7 + 3w^2

3w^2 + 7w -20 = 0

(3w - 10)(w - 2)

w can equal 10/3 or 2.

So the dimensions: are Width = 2 Length = 10

8 0
2 years ago
Plz help me this is really hard thx and im giving brainly
shutvik [7]

Answer:

  • \pmb{4000+800+10+2 }

Step-by-step explanation:

  • 4812

  • 4×(1000)+8(100)+10(1)+1(2)

  • 4000+800+10+2
6 0
2 years ago
Read 2 more answers
Other questions:
  • A study on how circus ticket pricing influences ticket sales shows that there is an average increase of 4 people for every $3 de
    9·1 answer
  • Find the axis of symmetry for the function below.<br> 2x^2 – 8x + 5 = 0
    12·1 answer
  • Four hundred twenty three times six equals
    14·2 answers
  • Two decreased by a half of a number is 1/2 of the number
    14·1 answer
  • I AM OFFERING 50 POINTS FOR THIS ANSWER. PLEASE HELP ME !
    7·1 answer
  • Lucy is saving money to buy a game. The game costs $21, and so far she has saved one-third of this cost. How much money has Lucy
    9·2 answers
  • Whats the answer for 2x+3y=-13 <br><br> I would appreciate all of the work please and thank you
    8·2 answers
  • Help me please this was due yesturday​
    6·1 answer
  • How to solve 87÷75.69
    15·2 answers
  • The perimeter of a rectangle is 84. If the length is 2 more than three times the width, what are the dimensions of the rectangle
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!