Understanding Variability in Data

What is an example of a situation that does not have variability?

• The number of people in a grocery store

• The number of months in a year

• The number of students in a class

• The number of cars in a parking lot

Which measure of spread is defined as the difference between the highest and lowest data points?

• Variance

• Standard deviation

• Range

• Interquartile range

What does the interquartile range measure?

• The spread of the middle 50% of data

• The average of all data points

• The variability of data over time

• The difference between the highest and lowest data points

Why does the number of people in a grocery store at 9 a.m. on a Saturday have variability?

• Because it is always the same every Saturday

• Because it changes depending on the Saturday

• Because it is a fixed number

• Because it is a specific event

Which of the following situations has no variability?

• The amount of rainfall in a month

• The number of people visiting a park

• The number of cars passing a toll booth

• The number of school holidays in a specific year

How does the number of inches it rained over the past three weeks demonstrate variability?

• It remains constant every three weeks

• It changes depending on the time of year

• It varies from week to week

• It is always the same in every location

What is the reason for variability in the number of students absent from school for the past week?

• The number is fixed every week

• The number is predetermined

• The number changes each week

• The number is the same for every school

Why does the number of points scored in last Saturday's football game have no variability?

• It is a specific event with a fixed outcome

• It is unpredictable

• It varies depending on the team

• It changes every game

What determines the variability in the number of students performing in halftime shows?

• The number is always the same

• It is predetermined by the school

• It varies with each game and location

• It depends on the specific halftime show

What is the purpose of reviewing the video on variability?

• To memorize the examples

• To practice identifying variability

• To learn new mathematical concepts

• To prepare for a test