Eduardo Araiza introduces himself and welcomes viewers to the tutorial.

• Eduardo Araiza greets the viewers and introduces himself.
• He signals the start of the tutorial.

Eduardo explains the structure of the grouped data and the ranges of the classes.

• The data is grouped in classes with intervals of 10 units, ranging from 10 to 80.
• Frequency distribution is provided for each class.

Eduardo describes the process of calculating the arithmetic mean for grouped data.

• He introduces the formula for the arithmetic mean as the sum of x multiplied by f, divided by n.
• Eduardo begins to create an additional column for the x values to use in the formula.

Eduardo continues with the calculation of the mean, introducing the class mark.

• Defines the class mark (xi) as the average of the lower and upper limits of a class.
• The class marks are calculated for each class and then used to find the product of xi and f for each class.

Eduardo demonstrates the completion of the mean calculation.

• Calculates the sum of the products of xi and f and the total number of data points (n).
• Divides the sum by n to find the arithmetic mean.

Eduardo begins explaining the process to find the median in grouped data.

• Introduces the formula for the median, which involves the lower limit, n/2, the cumulative frequency of the previous class, the frequency of the class, and the class width.
• Calculates n/2 to locate the median position within the frequency distribution.

Eduardo identifies the class in which the median lies and computes the value.

• Determines the cumulative frequencies and identifies the class containing the median.
• Inserts values into the median formula and calculates the median.

Eduardo explains how to determine the mode for the grouped data.

• Identifies the class with the highest frequency as the modal class.
• Uses the formula for the mode which includes the lower limit, the frequencies of the modal class, the previous class, the next class, and the class width.

Eduardo concludes the tutorial and invites viewers to like and subscribe.

• He hopes the viewers liked the tutorial and encourages them to show support.
• Eduardo signs off and invites viewers to subscribe to his channel.