Calculating Averages and Measures of Spread

The video tutorial covers three main types of averages: mean, median, and mode, along with a measure of spread called range. The mean is calculated by summing all values and dividing by the number of values. The median is the middle value in an ordered data set, and a formula can be used to find its location in large data sets. The mode is the most frequently occurring value, and data can be bimodal or have no mode if all values occur equally. The range is the difference between the largest and smallest values, indicating how spread out the data is.

What is the mean of the numbers 4, 8, and 12?

• 6

• 8

• 10

• 12

How do you find the median in a dataset with an odd number of values?

• Subtract the smallest value from the largest

• Add all values and divide by the number of values

• Identify the most frequently occurring value

• Order the values and find the middle one

If you have 50 numbers, how do you find the position of the median?

• Subtract the smallest from the largest

• Find the most common number

• Divide the total by 50

• Add 1 to 50 and divide by 2

What is the mode in the dataset: 2, 3, 3, 5, 5, 7?

• 2

• 7

• 3 and 5

• 5

How is the range of a dataset calculated?

• By finding the average of all values

• By identifying the most common value

• By subtracting the smallest value from the largest

• By finding the middle value