Mode(s) - 7. Find the mean for cach of the following sets of numbers.
a. 8, 10, 13, 10, 9, 12, 11, 7
b. 10, 10, 10, 11, 10, 10, 9, 10
c. 2, 9, 20, 8, 7, 14, 1, 19
d. -30, 0, 100, 15, -50, -5, 60, -10
8. Use the set of numbers in Exercise #7(a) and do the following.
i. Take each number in the set and subtract the mean. (These values are called the deviations or
deviations from the mean).
ii. Square each of the deviations. (These are called the squared deviations.)
iii. Find the mean of the squared deviations. (This value is called the variance for the data set.)
iv. Take the square root of the variance. (This value is called the standard deviation.)
(ii) squared
deviations
(ii) variance:
original 6) deviations
numbers from the mean
8
10
13
10
9
(iv) standard deviation:
12
11
7