Compare Populations

What do the box plots tell you about the growth of a typical plant species?

• B typically grows taller than A since the range for B is greater.

• B typically grows taller than A since the IQR for B is greater.

• A grows taller than B since the median for A is greater.

• A typically grows taller than B since the mean for A is greater.

Data from a survey asking students about the number of siblings in their families are shown. Compare the mean data.

• Students in 6th grade have 5 more siblings

• Students in each grade have a similar number of siblings

• Students in 7th grade have fewer siblings

• There is no difference in the number of siblings by grade

Answer the question above.

• 5

• 13

• 80

• 200

Answer the questions above.

• 123

• 156

• 36

• 64

If the population is ALL 7th Graders

Then you want to take a sample from ALL 7th graders.

A sample is part of the population but not all of it.

Select the one below that is true

• A sample is a smaller group selected from the population

• A sample is the entire population

• A sample is a larger group than the population

• A representative sample is not related to the population

What do the box plots tell you about the variability of the data?

• B has greater variability because its range and IQR are greater than A.

• B has greater variability because its median & mean are greater than A.

• A has greater variability because its range & IQR are greater than B.

• A has greater variability because its median and mean are greater than B.

Why do we use double box and dot plots?

• To make people confused

• to make data seem misleading

• to save space on paper

• to compare populations

How many more people 19 and under are in the French club than the Spanish club?

• 1

• 3

• 2

• 4

• A

• B

• C

• D

How many more people 19 and under are in the French club than the Spanish club?

• 1

• 3

• 2

• 4