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
bogdanovich [222]
3 years ago
9

The formula for the standard deviation of a sample is:

Mathematics
1 answer:
timofeeve [1]3 years ago
5 0

Answer:

d. The variance is 9.56 and the standard deviation is 3.09.

Step-by-step explanation:

From the above question, we are given the following data set.

3, 7, 8, 8, 8, 9, 10, 10, 13, 14

a) Mean = 3 + 7 + 8 + 8 + 8 + 9 + 10 + 10 + 13 + 14/ 10

= 90/10

= 9

b) Variance

The formula for sample Variance = (Mean - x)²/ n - 1

Mean = 9

n = 10

Sample Variance =

(3 - 9)² + (7 - 9)² + (8 - 9)² + (8 - 9)² + (8 - 9)² + (9 - 9)² + (10 - 9)² + (10 - 9)² + (13 - 9)² + (14 - 9)² / 10 - 1

= 36 + 4 + 1 + 1 + 1 + 0 + 1 + 1 + 16 + 25/9

= 86/9

= 9.555555556

≈ Approximately 9.56

Variance = 9.56

Sample Standard deviation = √Sample Variance

= √9.56

= 3.0919249667

≈ Approximately 3.09

You might be interested in
Choose the answers that have a repeating decimal?
Dmitry [639]
A 0.66... that the repeating decimals
4 0
3 years ago
What is the percent of decrease from 110 to 77
Charra [1.4K]
If you want to easily find the solution you can use your calculator.
Just divide 77 by 110 and see the result.
77/110 = 0.7 = 7/10 = 70/100 = 70% 
100% - 70% = 30%

Explanation
110*x=77
x=77/110, but the answer is not a percent
So 77/110 = ?/100  => ?=77*100/110=70 => 70%
But since 70% does not represent a percentage decreasement, we need to subtract it from the 100% 
100% - 70% = 30%
8 0
3 years ago
Choose the expression that represents a linear expression.
tresset_1 [31]

Answer:

Step-by-step explanation:

A linear expression has the highest power of the variable to 1, i.e ax+b

Then only the first option is in a linear expression format

9x-2

6 0
3 years ago
Read 2 more answers
(y+3); y=2 what is the answer
alexandr1967 [171]
No offense but this is really easy all you do is substitution (2+3)= 5
3 0
3 years ago
Read 2 more answers
jacquie hired a contractor to install a tile floor in her laundry room which measures 10.5 feet by 8 feet. the contractor inform
Agata [3.3K]
There are 3 types of cost for this problem: the cost for the area covered by the tiles, cost for hourly labor and the sales tax.

Cost of Area = (10.5 ft)(8 ft)($4.75) = $399
Cost of Hourly Labor = ($22/h)(7.5 h) = $165
Sum = $399 + $165 = $564
Cost of tax = $564(0.08) = $45.12

Total Cost = $564 + $45.12 = <em>$609.12</em>

So, the amount of the bill is incorrect.
5 0
3 years ago
Other questions:
  • What expression is equivalent to 4(2x+3)
    8·1 answer
  • What is the radius of a circle that has circumference of 81pi square inches?
    14·1 answer
  • A cube is 6 feet on each side. What is its volume?
    5·2 answers
  • It takes 2 minutes to print 3 photos. AT this rate, how long does it take to print 10 photos?
    14·2 answers
  • An 18 ft tall adult giraffe standing next to a statue casts a 9 ft shadow. If the statue is a 10 ft tall, then how long is it’s
    14·1 answer
  • 5.
    10·2 answers
  • Can someone help “is 9 a factor of 23p - 47
    7·2 answers
  • Twins Isaac and Isaiah were just born. Isaac weighs 6666 pounds 2222 ounces and Isaiah weighs 5555 pounds 4444 ounces.
    5·2 answers
  • Find the greatest common factor of 7 and 7
    10·2 answers
  • If the length between points on a map is 6 inches, 8 inches, and 9 inches, and the scale is one inch equals 5 miles, find
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!