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
VARVARA [1.3K]
3 years ago
10

Math Problem Solvingstatistics and probability​

Mathematics
1 answer:
luda_lava [24]3 years ago
5 0

Answer:

Standard Deviation = 3.22

Variance = 10.36

Step-by-step explanation:

x          P(x)           x × P(x)              x²             x² × P(x)

19         0.20           3.8                  361               72.2

10         0.20             2                   100                20

11          0.30           3.3                   121                36.3

12         0.20           2.4                   144               28.8

13          0.10            1.3                   169                16.9

____________________________________________

                            12.8                                         174.2            => Total

<em><u>Mean Formula</u></em>

\mu_x = \sum(x \times P(x)) = 12.8

\mu_x^2 = 163.84

<em><u>Variance Formula</u></em>

\sigma _x^2 = \sum[x^2 \times P(x)] - \mu_x^2      

   = 174.2- 163.84\\\\=10.36

<em><u>Standard Deviation Formula</u></em>

Standard\ deviation, \ \sigma_x = \sqrt{Variance}

                                   =\sqrt{10.36}\\\\=3.218      

   

You might be interested in
Is the equation y=3x + 10 proportional? Explain how you know
Tom [10]

Answer: Yes!

Step-by-step explanation:

If the x and y coordinates form proportional relationships, then there is some non-changing number (a constant) that when multiplied times x will create y. In this example, that number is 3 (y = 3x), and is called the constant of proportionality. ... It is a positive number.

5 0
3 years ago
Read 2 more answers
What is one and eighty six hundredths as a decimal?
Ad libitum [116K]
It is 1.86
hope it helps!!
cupcake~
8 0
3 years ago
8, 15, 20, 23, 29, 25, 30, 24, 28, 35, 32, 28, 27, 27, 25, 28, 29, 14, 22, 18 what is the outlier?
Dominik [7]

Answer:

17

Step-by-step explanation:

5 0
3 years ago
Please help me quickly first person to answer gets branliest
ivolga24 [154]
The answer should be 117.6. tell the teacher that the amount of meters is wrong or the answers are wrong

sorry :(
3 0
4 years ago
The function f(x)--&gt;4-3sinx is defined for the domain 0≤x≤2pi
Alex787 [66]
 <span>1--- f(x) = 4 - 3 sin x = 2 
-3 sin x = -2 
sin x = 2/3 
x ≈ 0.7297276562... ≈ 0.73 

2--- -1 ≤ sin x ≤ 1 
-3 ≤ 3 sin x ≤ 3 
3 ≥ -3 sin x ≥ -3 
7 ≥ 4 - 3 sin x ≥ 1 

If k < 1 or k > 7, there is no solution. 

3--- A = 3π/2 

4--- g(x) = 4 - 3 sin x = y 
4 - 3 sin y = x 
4 - x = 3 sin y 
(4 - x)/3 = sin y 
sin^-1 (4 - x)/3 = y= g^-1 

g^-1 (3) = sin^-1 (4 - 3)/4 = sin^-1 1/4 = 2.8017557... ≈ 2.802

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span>
3 0
4 years ago
Other questions:
  • Jade and Dwayne work at a candy store. Every day for 7 days, Jade sold 10 packs with 6 candies each, and Dwayne sold 8 packs wit
    11·1 answer
  • Which figuare has an order 3 rotational symmetry?
    9·1 answer
  • True or false: Vertical angles are the top and bottom angles of the four angles formed by two intersecting lines.
    15·1 answer
  • The basement is 28ft wide and 35ft long. How wide and long is the drawing?
    9·1 answer
  • The altitude a
    12·1 answer
  • One day in December the temperature in Dublin was -3°C, in Salerno it was 7°C, while in Murmansk it was -10°C.
    10·2 answers
  • PLS HELP THIS IS A TEST !!! SHOW PLS WORK. 15 POINTS GIVEN AND BRAINLIEST !!
    11·1 answer
  • Could someone help me with this im so confused
    6·1 answer
  • Help pls pls help pls pls help
    6·2 answers
  • Students from Shelton Middle are going on a field trip to an amusement park. Those students who have annual passes will pay $10.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!