Question

What is the variance of the following data? If necessary, round your answer to two decimal places.12, 13, 8, 13, 9, 11, 12, 9, 11

Answer 1

To find the variance of the given data, calculate the mean, calculate the deviations from the mean, square each deviation, and find the mean of the squared deviations.

Step-by-step explanation:

To find the variance of the given data, follow these steps:

1. Find the mean of the data set by adding all the values and dividing by the number of values.
2. Calculate the deviations from the mean by subtracting the mean from each value.
3. Square each deviation.
4. Find the mean of the squared deviations.

The result is the variance. In this case, the variance of the data set is 3.16 (rounded to two decimal places).

Answer 2

To find the variance, 1. Find the arithmetic mean (average) 2. Find the distance of each number from the mean (x-the mean=?) 3. Square each number 4. Add up all of the squares 5. Divide the final sum by the original mean.