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
earnstyle [38]
3 years ago
13

May someone help me out with this please

Mathematics
1 answer:
Fiesta28 [93]3 years ago
7 0
First we find the mean (average)
(7 + 8 + 9 + 9 + 10 + 11)/6 = 54/6 = 9

now we subtract the mean from every data number....and square it
7 - 9 = -2...-2^2 = 4
8 - 9 = -1...-1^2 = 1
9 - 9 = 0....0^2 = 0
9 - 9 = 0...0^2 = 0
10 - 9 = 1....1^2 = 1
11 - 9 = 2....2^2 = 4

now we find the mean (average) for those numbers
(4 + 1 + 0 + 0 + 1 + 4) / 6 = 10/6 = 1.67...this is the variance

to find the standard deviation, take the sqrt of the variance
sqrt 1.67 = 1.29 <== ur answer
You might be interested in
What is 9 out of 100 as a percent ?
UkoKoshka [18]

Answer:

9%

Step-by-step explanation:

9/100 = 0.09

To convert to a percent, multiply by 100 and add a percent sign:

0.09 * 100 = 9%

5 0
3 years ago
Read 2 more answers
Find the acute angle between the two given lines<br><br> y=-2x and y=x
Marina CMI [18]

Answer:

θ ≈ 71.6°

Step-by-step explanation:

The angle between two lines with slopes m₁ and m₂ is:

tan θ = | (m₂ − m₁) / (1 + m₁m₂) |

Here, m₁ = -2 and m₂ = 1.

tan θ = | (1 − (-2)) / (1 + (-2)(1)) |

tan θ = | 3 / -1 |

tan θ = 3

θ ≈ 71.6°

3 0
3 years ago
Convert 28/50to a percent
velikii [3]
The answer is 56%
You first divide 28 by 50=.56, then since it's a decimal, you move the decimal twice to the right to make a percentage=56%
3 0
3 years ago
Question 1 of 10
Mnenie [13.5K]

Answer: A

Step-by-step explanation:

7 0
2 years ago
Find the slope of the line between (1,5)and (3,9)
Volgvan
We can use the points in either order and you will still get the same slope. I usually solve in order that is given. So the first coordinates I label (x1,y1) and the second is (x2,y2).

Slope=m=(y2-y1)/(x2-x1)
m=(9-5)/(3-1)=4/2=2

Slope is 2.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Arlene is comparing the prices of two truck rental companies. Company A charges $7 per hour and an additional $30 as service cha
    7·1 answer
  • Explain how you know that 7/12 is greater than 1/3 but less t than 2/3
    15·1 answer
  • Which theorem or postulate proves that △ABC and △DEF are similar?
    7·2 answers
  • Describe a real life multiplication situation for which an estimate makes sense.
    13·1 answer
  • At what temperature did the gas have a volume of 110 mL?<br> 300 K<br> 110 K<br> 20 K<br> 19 K
    6·1 answer
  • II
    15·2 answers
  • in triangle pqr the measure of r=90 rp=3.7 and pq=9.5 find the measure of &lt;Q to the nearest tenth of a degree​
    7·1 answer
  • Divide. Give the quotient and remainder 18divided by 4
    13·1 answer
  • I need help with the the answer
    6·1 answer
  • Which of the lines below is a line of symmetry?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!