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
GalinKa [24]
2 years ago
15

What is the variance of the following data? If necessary, round your answer to two decimal places.12, 13, 8, 13, 9, 11, 12, 9, 1

1
Mathematics
1 answer:
siniylev [52]2 years ago
8 0
To find the variance, 1. Find the arithmetic mean (average) 2. Find the distance of each number from the mean (x-the mean=?) 3. Square each number 4. Add up all of the squares 5. Divide the final sum by the original mean. 
You might be interested in
Plz help this one is the last one of the day plz help
Juliette [100K]
We know 20% is 15
and now we find 80%

since 20% x 4 = 80%, we can multiply 15 by 4 to get 80% of 75

15 x 4 = 60

80% of 75 = 60
3 0
3 years ago
I need help pleaseeeees
Dimas [21]
It represents the y axis and the x axis. hope this helps! :)
7 0
3 years ago
In science class Abigail Broadway 0.88 kilogram what is the value of the digit in the tenths place
zaharov [31]
0.88......ones (decimal), tenths, hundredths
so 8 is in the tenths place....8/10
7 0
3 years ago
Find the area of the shaded region in the figure below, if the radius of the outer circle is 8 and the radius of the inner circl
Inessa05 [86]

Answer:

48 π

Step-by-step explanation:

Area of Circle =πr∧2

Big Circle Area = π(8)∧2 = 64π

Small Circle Area =π(4)∧2= 16π

Shaded Region = 64π - 16π = 48π

4 0
3 years ago
Please show work if you do, ( and get it right) I will make you brainliest!!!
DerKrebs [107]

Answer:

The percentage increase in bird population in the second years is 4%  .

Step-by-step explanation:

Given as :

During two years, the population of birds of an island became 7 times more than before.

The the percentage increase in first year = = r_1 =40%

Let The percentage increase in second year =  r_2 = r%

So, According to question

The initial population of bird = x

The increase population of bird =7 times before = 7 x

Now,

The increase population of bird = initial population of bird × (1+ \dfrac{r_1}{100}) ×  (1+ \dfrac{r_2}{100})

Or, 7 x = x × (1+ \dfrac{40}{100}) ×  (1+ \dfrac{r}{100})

Or, \dfrac{7 x}{x} = 1.4 ×  (1+ \dfrac{r}{100})

Or, 7 = 1.4 ×  (1+ \dfrac{r}{100})

Or, \dfrac{7 }{1.4} = (1+ \dfrac{r}{100})

Or, 5 = (1+ \dfrac{r}{100})

Or, (1+ \dfrac{r}{100}) = 5

Or, \dfrac{r}{100} = 5 - 1

Or,  \dfrac{r}{100} = 4

∴ r = 4 × 100

I.e r = 400

so, The percentage increase = r% = 4

Hence The percentage increase in bird population in the second years is 4%  . Answer

3 0
3 years ago
Other questions:
  • A rectangular table is four times as long as it is wide. If the area is 36 ft2, find the length and the width of the table.
    6·2 answers
  • A randomized, controlled experiment investigated this question using a random sample of 540 adult males as subjects. At the begi
    7·1 answer
  • The dimensions of a 60 inch television set are approximately 52.28 inches wide and 29.42 inches high. What's the simplified rati
    6·2 answers
  • Convert a 3% increase into a multiplier​
    10·2 answers
  • 4 1/3 + 6 2/5<br> Please show how you got the answer
    6·1 answer
  • The age of sara's father is thrice hers the age of sara's brother is 4 years more than her find an expression in terms of y for
    8·2 answers
  • Find the value of x.
    11·1 answer
  • Can someone please help me and write out the answer​
    11·2 answers
  • A) Draw a sketch to illustrate this information
    8·1 answer
  • Aisha estimates the product of 12 and 2.4 by rounding 2.4 to the nearest whole.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!