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What is the standard deviation of 1 2 3 4 5 6 7 8 9?
2.738612788 First, find the mean (average) of all the numbers: 1+2+3+4+5+6+7+8+9 = 45 45 / 9 = 5 Mean is 5 Now take every number and calculate how far it is away from the mean, then square that number 1-5 = -4 ^2 = 16 2-5 = -3 ^2 = 9 3-5 = -2 ^2 = 4 4-5 = -1 ^2 = 1 5-5 = 0 ^2 = 0 6-5 = 1 ^2 = 1 7-5 = 2 ^2 = 4 8-5 = 3 ^2 = 9 9-5 = 4 ^2 = 16 Next, add all the results: 16+9+4+1+0+1+4+9+16 = 60 Then divide by the sample size minus 1 (n-1): 60 / 8 = 7.5 Finally, find the square root of that number: 7.5^ 0.5 = 2.738612788 Answer: 2.738612788
What is the sum of 2 over 9 plus 1 over 3?
2/9 + 1/3 = 2/9 + 3/9 - Note the equivalence of the fraction 1/3 & 3/9 Add the numerators 5/9 The Answer . 5/9 = 0.555.... ( recurring to infinity as a decimal).
What is the sum of the first 75 digits of pi after the decimal?
1+4+1+5+9+2+6+5+3+5+8+9+7+9+3+2+3+8+4+6+2+6+4+3+3+8+3+2+7+9+5+0+2+8+8+4+1+9+7+1+6+9+3+9+9+3+7+5+1+0+5+8+2+0+9+7+4+9+4+4+5+9+2+3+0+7+8+1+6+4+0+6+2+8+6
How do you work out 2a-5 when a equals 9 in algebra?
2*9 - 5 = 18 - 5 = 13
4. Write an equation in standard form for a line satisfying the given condition. Through -2 and 9 and -2 and 7.?
The standard form is Ax + By = C. The slope of the line is (9-7)/(-2 - (-2)) or 2/0. This indicates that this is a vertical line whose x intercept is -2. The equation of the line is then x = -2.
What is the standard deviation of 5 5 5 7 9 9 9?
7
What is the standard deviation of 9?
You need more than one number to calculate a standard deviation, so 9 does not have a standard deviation.
What is the variance and standard deviation of 4 7 2 7 9 10 15?
Variance = 17.9047619 Standard Deviation = 4.23140188
What is the mean variance and standard deviation for the numbers 2 4 8 2 9 1 7 11 4 7 1 10 1 5?
5.142857143 is the mean.12.43956044 is the variance.3.526976104 is the standard deviation.
Compute the variance and standard deviation of the following sample data:5 9 10 2 7 9 14?
mean =(5+9+10+2+7+9+14)/7=8 s^2 = Variance = (1/7){(5-8)^2+(9-8)^2+(10-8)^2+(2-6)^2+(7-8)^2+(9-8)^2+(14-8)^2}=14.6666 Standard deviation =s= sqrt(14.6666)=3.8297
Find the range and standard deviation of the data set. 22 18 19 25 27 21 24?
The range is 9 and 3.01 is the standard deviation.
What is a population standard deviation of 2 6 15 9 11 22 1 4 8 19?
7.087547766 is the standard deviation for those figures.
What is the standard deviation of the data set 5 7 9 11 13?
It is approx 2.828
The weights of nine men have a mean of 175 and a standard deviation of 15 what is the standard error of the mean?
(15/sqroot(9))=5 So it is 5
What is the range and standard deviation of 9 15 15 15 16?
9 15 15 15 16 (five data) Range = 16 - 9 = 7 Mean = (9 + 15 + 15 + 15 + 16)/5 = 70/5 = 14 So we have: (9 - 14)2 = (-5)2 = 25 (the square of the difference of data value and the mean value) (15 - 14)2 = 12 = 1, 3(1) = 3 (16 - 14)2 = 22 = 4, the sum is 32 The standard deviation = √(32/5) ≈ 2.5
What is the mean absolute deviation of 2 3 5 4 9 4 3?
Absolute deviation from what?
How do you create data set with larger standard deviation?
Standard deviation is the square root of the sum of the squares of the deviations of each item from the mean, i.e. the square root of the variance. In order to increase the standard deviation, therefore, you need to increase the average deviation from the mean. There are many ways to do this. One is to move each item further away from the mean. For example, take the set [2, 4, 4, 4, 5, 5, 7, 9]. It has a mean of 5 and a standard deviation of 2.14. Multiply each item by 2.2 and subtract 5, giving the set [-1.3, 2.9, 2.9, 2.9, 5, 5, 9.2, 13.4], effectively moving each item 10% further away from the mean. This still has a mean of 5, but the standard deviation is 4.49.
