SOLUTION: The mean of numbers 3,6,4,x and 7 is 15.find the standard deviation

Question 1152846: The mean of numbers 3,6,4,x and 7 is 15.find the standard deviation
Found 2 solutions by MathLover1, MathTherapy:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
The mean of numbers ,,, and is .
find the standard deviation
first find

the standard deviation:
,,,,
Then, take each number, subtract the mean and square the result:

---------------------------------
sum of Differences^2------=
find Variance: Sum of Differences^2 / (Count−1)

Standard Deviation: the square root of the variance
≈

Answer by MathTherapy(10558) (Show Source): You can put this solution on YOUR website!
The mean of numbers 3,6,4,x and 7 is 15.find the standard deviation

If these numbers represent a POPULATION - and I believe they do - then the correct answer is:
If they represent a SAMPLE distribution, then it's a different answer.
RELATED QUESTIONS
Consider 5 samples of tree heights taken in feet: 5.5, 6.2, 7.0, 4.1, 3.3 What is the... (answered by ewatrrr)
Find the mean and standard deviation of the following probability distribution: x (answered by ewatrrr)
Find the mean, variance, and standard deviation for the following probability... (answered by Fombitz)
A list of numbers have mean 7 and standard deviation 2.5. If x is a number in the list... (answered by stanbon)
The mean of eight numbers 4,6,4,7,x,x+1,8 and 2 is 5.Find... (answered by Boreal,MathLover1)
The mean of eight numbers 4,6,4,7,x,x+1,8 and 2 is 5.Find... (answered by MathLover1)
The mean of eight numbers 4,6,4,7,x,x+1,8 and 2 is 5.Find x (answered by MathLover1)
For this frequency distribution find the: A. Sample mean B. Sample Standard... (answered by ikleyn)
A random variable X has mean 10.5 and variance 7.3. What is the standard deviation of... (answered by Edwin McCravy)