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
Molodets [167]
3 years ago
8

Calculating the degrees of freedom, the sample variance, and the estimated standard error for evaluations.

Mathematics
1 answer:
ki77a [65]3 years ago
4 0

Answer:

The variance is  \sigma ^2  =25

Step-by-step explanation:

From the question we are told that

    The sample size is  n =  21

     The sum of squares is SS =  500

Generally the variance is mathematically represented as

           \sigma ^2  = \frac{SS}{n- 1}

substituting values

          \sigma ^2  = \frac{ 500}{21- 1}

          \sigma ^2  =25

   

You might be interested in
X-y=−3 slope intercept form
seraphim [82]

Answer:

y = x +3

Step-by-step explanation:

5 0
3 years ago
PLA HELP PLS I NEED TO PASS !! Mendel team built a structure for a competition using wooden spheres and cylinders. The wood they
Ainat [17]
The answer to your question is 22.875
6 0
3 years ago
Money Neil has a total of twelve $5 and $10 bills in his wallet. He has 5 times as many $10 bills as $5 dollar bills. How many o
Vlada [557]

Answer:

He has 2 $5 bills and 10 $10 bills

7 0
3 years ago
The buying rate and selling rate of a Australian dollar in a bank are rs 80.20and rs 81.40respectively how much Australian dolla
olya-2409 [2.1K]

Answer:

5000 Australian Dollars

Step-by-step explanation:

To find out how many Australian dollars need to be sold, we first need to find the profit of a single dollar sold.

We will be using the formula for profit, which is:

Profit = Total Revenue - Total Cost

Now we define the available variables.

Total Revenue = 81.40

Total Cost = 80.20

Profit = 81.40 - 80.20

Profit = rs 1.20/dollar

Now we have to find how many dollars we have to sell to get a profit of rs 6000.

We simply divide the amount of profit that we want to the price per dollar.

Total Profit = 6000

Profit per dollar = 1.20

This give us:

6000 / 1.20 = 5000 Australian Dollars.

4 0
3 years ago
What is 159as a percent
11Alexandr11 [23.1K]

Answer:

159 as a percent = 15900%

Brainiest if helpful!

Step-by-step explanation:

To convert 159 to percent multiply 159 by 100. The result is 15900 percent, or, using the percent sign, 15900 %. Put simply, to change 159 to % move the ″.″ two places to the right.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Division of fractions by fractions
    10·1 answer
  • I need help in Pre-Algebra! This assignment is due today & I have no idea how to do it, PLEASE HELP!
    11·1 answer
  • Express 2.65 as a mixed a mixed number in lowest terms. PLEASE HELP!!!!
    14·2 answers
  • Please help me with this Statistics problem
    12·1 answer
  • Jerome’s aunt, who is 51, is three times Jerome’s age. What is Jerome’s age?
    10·2 answers
  • What is the shape of -2x^(2)+6y^(2)+5x+5y-4=0
    15·1 answer
  • Use synthetic division to solve (x4 – 1) ÷ (x – 1). What is the quotient?
    10·2 answers
  • Amanda wants to make a rectangular fenced area for her dogs. She wants the area to be 32 square feet with the length of the yard
    12·1 answer
  • $5000 grew to $9000 at the compound interest of 12% per annum what was the years taken for the investment​
    15·1 answer
  • What is the value of y in the equation 4 + y = −3? (1 point) 7, 1, −1, −7
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!