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
Natasha_Volkova [10]
3 years ago
10

Find the population variance of: 4 6 8 9 9 round to the nearest hundredth

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
5 0

Answer:

Step-by-step explanation:

To find the population variance, we first need the mean:

\bar{x}=\frac{4+6+8+9+9}{5}=\frac{36}{5}=7.2 so the mean is 7.2. To find the population variance (which is almost exactly the same as the sample variance except for a small difference in the denominators of the formula) we have to take each number minus the mean, and then square the difference. Add together all these squared numbers and then divide by the number of numbers. Like this:

(4-7.2)^2=10.24\\(6-7.2)^2=1.44\\(8-7.2)^2=.64\\(9-7.2)^2=3.24\\(9-7.2)^2=3.24

Add together those numbers and divide them by 5:

\sigma=\frac{10.24+1.44+.64+3.24+3.24}{5}=\frac{18.8}{5}=3.76

You might be interested in
The media center has 3 adults and 27 students.
s344n2d4d5 [400]
1,2,5,10 i believe!
4 0
3 years ago
Read 2 more answers
What a good men what a ever good men
Pepsi [2]

Answer: then what a bad man

Step-by-step explanation:

6 0
3 years ago
The size of the largest angle in a triangle is 3 times the size of the smallest angle.
tamaranim1 [39]

The sizes of the angles are 34° , 44° , 102°

Step-by-step explanation:

The given is:

  • The size of the largest angle in a triangle is 3 times the size of the smallest angle
  • The third angle is 10° more than the smallest angle
  • The size of the third angle is x

We need to find the size of each angle in the triangle

∵ The size of the smallest angle = x°

∵ The size of the largest angle is 3 times the size of the smallest angle

∴ The size of the largest angle = x × 3 = (3x)°

∵ The third angle is 10° more than the smallest angle

∴ The size of the third angle = (x + 10)°

Add the size of the three angles and equate the sum by 180°

∵ The sum of the sizes of the interior angles of a Δ is 180°

∴ x + (3x) + (x + 10) = 180

∴ x + 3x + x + 10 = 180

- Add like terms

∴ 5x + 10 = 180

- Subtract 10 from both sides

∴ 5x = 170

- Divide both sides by 5

∴ x = 34

∵ x is the size of the smallest angle

∴ The size of the smallest angle is 34°

∵ 3x is the size of the largest angle

∴ The size of the largest angle = 3(34) = 102°

∵ x + 10 is the size of the third angle

∴ The size of the third angle = 34 + 10 = 44°

The sizes of the angles are 34° , 44° , 102°

Learn more:

You can learn more about the triangles in brainly.com/question/1479138

#LearnwithBrainly

6 0
3 years ago
What is the answer someone help please
Maru [420]
166.25 thats the answer
4 0
3 years ago
What is 4(x−2)=3(2y−1) in standard form?
exis [7]

Answer: 4x-6y=5

Step-by-step explanation: Using the formula, Ax+By=C, write the equation in standard form.

Hope this helps you out! ☺

8 0
3 years ago
Other questions:
  • Larry used a pattern of colors to make a cube train. He used a red cube, a blue cube, a red cube, and another red cube before he
    10·1 answer
  • UNITED AIRLINES
    14·1 answer
  • This graph shows the solutions to the inequities y > - 1/3x + 5 and y < - 1/3x - 1.
    8·2 answers
  • What is the solution to 2(z+3)+(5-3z)?
    8·2 answers
  • What is the volume of a cube with a width of 1 1/2 and a length of 2 1/2 and a height of 4 inches
    9·2 answers
  • Brainliest and 10 points for answer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    14·2 answers
  • What is 7 squared in standard form
    12·2 answers
  • Please help with this problem!
    5·1 answer
  • If car a drive 300 miles and 6 hours and karbi drive 50 miles in a certain amount of time what is the unknown
    15·1 answer
  • What two numbers multiply to 72 and add to 14?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!