answer.
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
anyanavicka [17]
2 years ago
11

Find the variance of 101, 102, 100, 100, 110, 109, 109, 108, 109

Mathematics
1 answer:
Andreyy892 years ago
6 0
101, 102, 100, 100, 110, 109, 109 ,108, 109 average to 105.3



subtracting the mean from each number yields the below-

-4,-3,-5,-5,5,4,4,3,4



Squaring each number gives-

16,9,25,25,16,16,9,16



The average of these numbers is 12.89 to two decimal places, so your variance is 12.89
You might be interested in
Katherine has 32 pop songs and 72 rock songs on her mp3 player that she will be organizing into playlists. She wants to put an e
ruslelena [56]

Answer:

Katherine will make minimum 8 playlists. Each playlist will contain 4 pop songs and 9 rock songs.

Step-by-step explanation:

We have been given that Katherine has 32 pop songs and 72 rock songs on her mp3 player. She is willing to organizing the songs into playlists such that there are equal number of pop songs and an equal number of rock songs into each playlist.

We can find the minimum number of playlists by finding GCF of the given two numbers.

We can write 32 = 2^5 and we can write 72 = 2^3*3^2

Therefore, GCF of the two numbers is 2^3 = 8.

Hence, she will be making total 8 playlists where each playlist will contain 4 pop songs and 9 rock songs.

6 0
2 years ago
The following table shows the salary of 7 people in an office last year.
kotegsom [21]

Answer:

a.  £24,714.29

b. £16,833.33

Step-by-step explanation:

The calculation of mean income is given below:-

Mean income = Total addition of salaries ÷ Number of workers

= £9,500 + £25,000 + £13,250 + £72,000 + £12,750 + £29,500 + £11,000

= £173,000 ÷ 7

= £24,714.29

Now,

the Mean income excluding Deva's salary:

= Formula of Mean income

= Total addition of salaries excluding Deva salary ÷ Number of workers

= (£9,500 + £25,000 + £13,250 + £12,750 + £29,500 + £11,000) ÷ 6

= £101,000 ÷ 6

= £16,833.33

7 0
2 years ago
A bridge builder wants to know the width of a river. He stands at point A along the river. He picks a point C directly across th
Maurinko [17]
<span>width = 90 tan43 degrees = about 84 feet </span>
8 0
2 years ago
Simplify aaa^3bxa^2b^3abx^4
dolphi86 [110]
Aaa^3bxa^2b^3abx^4
=aaa^3a^2abb^3bxx^4
=a^(1+1+3+2+1)b^(1+3+1)x^(1+4)
=a^8^b^5x^5
5 0
2 years ago
Write 2036017 in expanded form using exponents
taurus [48]
2,000,000
+ 0
+ 30,000
+ 6,000
+ 0
+ 10
+ 7
7 0
2 years ago
Read 2 more answers
Other questions:
  • Tom predicted that the Giants would score three 3-point field goals, score two 6-point touchdowns, and score 1 extra point. If T
    11·2 answers
  • Mayumi hikes 3 miles in 2 hours. Edwin hikes 4 miles in 3 hours. Who takes more time to complete a 12 mile hiking trail? How muc
    5·1 answer
  • Carlos begins his workout by stretching. Then he spends an equal amount of time on each workout machine. The equation y = 8x + 1
    8·2 answers
  • A trapezoid with an area of 166.75 in has bases that measure 21 in and 8 in find the height of the trapezoid
    9·2 answers
  • For an investment of $26,245, a quarterly statement reports that the account balance is $26,292. The statement also reports that
    8·2 answers
  • The table shows the cost of buying pencils at the school bookstore. If the data were graphed
    15·2 answers
  • Sadie simplified the expression StartRoot 54 a Superscript 7 b cubed EndRoot, where a greater-than-or-equal-to 0, as shown colon
    13·2 answers
  • Chris buys 8 more Ninja Turtles than Star Wars action figures. The Ninja Turtles cost $7 each and the Star Wars cost $9 each. Wr
    14·1 answer
  • The graph shows the cost of a lunch in a school’s cafeteria since school started.
    9·2 answers
  • Sam is 12. In four years, his age will be 2/3 the age of his cousin Lupe. How old will Lupe be in two years?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!