Exploring Central Tendency and Two-Way Tables

This video introduces Unit 9, focusing on statistics, data analysis, and displays. It covers central tendencies, including mean, median, and mode, and explains how to calculate each. The video also discusses the range, comparing data representations, and interpreting two-way tables. It concludes with calculating percentages and relative frequencies, providing examples and practice problems.

What does Unit 9 primarily focus on?

• Calculus

• Geometry

• Algebra

• Statistics

How do you calculate the mean of a data set?

• Add all numbers and divide by the total count

• Arrange numbers and find the middle value

• Find the number that appears most frequently

• Subtract the smallest number from the largest

What is the median in an odd set of numbers?

• The most frequent number

• Average of two middle numbers

• The middle number after arranging in order

• Difference between highest and lowest numbers

In an even set of numbers, how is the median found?

• It is the middle number

• There is no median

• Average of the two middle numbers

• The most frequent number

What does the mode represent in a data set?

• The average value

• The middle value

• The range of the data

• The most frequent value

How is the range of a data set calculated?

• Add the highest and lowest numbers

• Identify the most frequent number

• Subtract the lowest number from the highest

• Find the average of all numbers

What is the purpose of a two-way table?

• To find the median of a data set

• To calculate the mean

• To display relationships between two categories

• To determine the mode

How do you fill in missing values in a two-way table?

• Adding rows and columns to match the total

• Using the mean of the available numbers

• By guessing based on patterns

• Subtracting given totals from the grand total

What percentage of people surveyed prefer electronic books?

• 60%

• 58%

• 50.8%

• 35%

What is the relative frequency of adults choosing printed books?

• 58%

• 60%

• 35%

• 50%