Exploring Populations and Samples in 7th Grade Math

What percentage of lunch items sold were turkey sandwiches?

• 32%

• 38%

• 10%

• 20%

Tags

CCSS.8.SP.A.4

In the context of the cafeteria, what does the population refer to?

• The cafeteria staff

• Only the students who buy lunch

• All the students in the school

• All the food items available

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Why is it beneficial for the cafeteria manager to analyze sales over multiple days?

• To prepare for health inspections

• To adjust for daily variations and special events

• To reduce food costs

• To increase the menu items

Why might a cafeteria manager look at sales data from multiple days?

• To train new staff

• To prepare better for health inspections

• To identify the most popular item

• To plan special menus for events

Tags

CCSS.6.SP.B.5A

What is a representative sample?

• A sample that reflects the characteristics of the entire population

• A sample taken from one specific group

• A sample that includes the majority of the population

• A sample that is easiest to obtain

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

How can randomness in sampling help in surveys?

• It ensures everyone has an equal chance of being selected

• It reduces the need for a large sample size

• It makes the survey process faster

• It allows for targeted sampling of specific groups

Tags

CCSS.HSS.IC.B.3

What is the first step in generating a random sample for a survey?

• Assigning numbers to each member

• Choosing the sample size

• Collecting the data

• Defining the population

Tags

CCSS.HSS.IC.B.3

Why is it important to have a representative sample in a survey?

• To focus only on the majority opinion

• To guarantee the accuracy of the survey results

• To ensure the survey is completed quickly

• To reflect the characteristics of the entire population

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

What could be a consequence of not using a representative sample?

• The survey can be done more quickly

• The results will be more reliable

• The survey will be cheaper to conduct

• The results may be biased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

What method can be used to ensure a sample is random?

• Choosing participants from a specific area only

• Using a random number generator to pick participants

• Selecting people based on a pre-set criteria

• Asking only the first 100 people who arrive

Tags

CCSS.HSS.IC.B.3