The mean of a dataset is calculated by dividing the sum of all values by ___ .

The number of values

Using the Assumed Mean method, 
if A = 71 and the total deviations 
from 
A sum to -12 for 10 observations, 
what is the mean?

69.8

The cumulative frequency of a class interval is obtained by adding the frequencies of all classes ___ it.

Preceding

What is the formula for calculating the median in a grouped frequency distribution?

Median 
= l + [(n/2 - cf) / f] * h

Fill in the blank: In the empirical relationship, 
3 * Median 
= Mode + 2 * ___.

Mean

True or False: The modal class is the class interval that has the lowest frequency.

False: The modal class has the highest frequency.

Using the Step Deviation method, if the assumed mean is 71 and class size is 2, how do you calculate deviations?

Ui = (xi - A) / h

Fill in the blank: The mode of a grouped frequency distribution can be calculated using the formula: 
Mode = l + [(f1 - f0) / (2f1 - f0 - f2)] * h, where l is the lower limit of the modal class, and h is the ___ .

Size of the class interval