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
cluponka [151]
2 years ago
11

find the standard deviation for this data set 9, 15, 13, 9, 15 round your answer to the nearest tenth

Mathematics
1 answer:
KatRina [158]2 years ago
7 0

Answer:

  • 3.0

Step-by-step explanation:

Sample standard deviation is found by steps below.

<u>Find the mean:</u>

  • μ = (9 + 15 + 13 + 9 + 15)/5 = 12.2

<u>Find deviations from the mean and their squares:</u>

  • 9 - 12.2 = - 3.2 ⇒ (-3.2)² = 10.24
  • 15 - 12.2 = 2.8 ⇒ 2.8² = 7.84
  • 13 - 12.2 = 0.8 ⇒ 0.8² = 0.64
  • 9 - 12.2 = - 3.2 ⇒ (-3.2)² = 10.24
  • 15 - 12.2 = 2.8 ⇒ 2.8² = 7.84

<u>Sum the squares:</u>

  • 10.24*2 + 7.84*2 + 0.64 = 36.8

<u>Divide by N - 1 (N - number of samples):</u>

  • 36.8/(5 - 1) = 9.2

<u>Square root is the sample standard deviation:</u>

  • σ = √9.2 = 3.0 (rounded)
You might be interested in
A rectangular dog cage has a length of 4 1/2 feet and a width of 3 3/7 feet. What is the area of the cage?
liberstina [14]

Step-by-step explanation:

Area of rectangle =height×base

4 1/2×3 3/7=9/2×24/7=216/14=15 6/14=15 3/7

3 0
3 years ago
Identity all obtuse angles in the drawing below
8_murik_8 [283]
Angle ab would be the correct answer
8 0
2 years ago
Sin2x=______
joja [24]

Answer:

A.2sinxcosx

Step-by-step explanation:

We know the trig identity

Sin (2a) = 2 sin a cos a

sin (2x) = 2 sin x cos x

8 0
2 years ago
What is the slope for y = 4 + 3x? *<br> Your answer
Leto [7]

Answer:

3

Step-by-step explanation:

5 0
2 years ago
Solve x 2 + 9x + 8 = 0 by completing the square. What are the solutions?
vivado [14]

x^2+9x+8=0

 (x+1)(x+8)=0

x+1=0

x=-1

x+8 = 0

x=-8


 solutions are -1 and -8

3 0
3 years ago
Other questions:
  • Please don't delete my question! Here they are:
    9·2 answers
  • Find the product of X^2+x-12/x^2-5x-6 with complete solution
    11·1 answer
  • The value of y varies directly as x, and y is 8 when x is 2. What is the value of y when x is 10?
    5·1 answer
  • 19) Complete the square to determine the minimum or maximum value of the function defined by the expression. x2 + 4x + 3
    7·1 answer
  • What value from the set {6, 7, 8, 9, 10} makes the equation 5x + 2 = 47 true? Show your work.
    5·1 answer
  • I is the origin and P is the (4,3). Rx and Ray are reflections around the x- and y- axes
    9·1 answer
  • 14) Rounded to the nearest whole number, the square
    14·1 answer
  • HELP PLEASE I NEED THE EQUATION
    11·1 answer
  • A Ski resort tracks the proportion of seasonal employees who are rehired each season. Rehiring a seasonal employee is beneficial
    8·1 answer
  • Note: Please make sure to properly format your answers. All dollar figures in the answers need to include the dollar sign and an
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!