Sampling

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.

Answer the questions above.

• 123

• 156

• 36

• 64

What inference can be made about the populations based on Paisley's data?

• young teachers drive trucks

• SUVs are driven by teachers with families

• most teachers drive sedans

• fewer teachers drive sedans than SUVs

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

Identify the Sample: The Huddle House wants to know if their customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The manager at Huddle House concluded that most customers do not order dessert. What is the SAMPLE in this scenario?

• 20 customers from Huddle House

• All customers from Huddle House that evening

• 8 customers from Huddle House

• The employees from Huddle House

A survey is conducted by randomly selecting 150 students out of 750 students in a school to find out their favorite subject. If 60 out of the 150 students chose science, estimate the total number of students in the school who would choose science as their favorite subject.

• 200

• 300

• 400

• 500

A survey is conducted by randomly selecting 200 students out of 800 students in a school to find out their favorite sport. If 80 out of the 200 students chose soccer, estimate the total number of students in the school who would choose soccer as their favorite sport.

• 200

• 320

• 400

• 480

If a population consists of 500 people and a sample of 50 people is taken, what is the sample size as a percentage of the population?

A school principal wants to see which subject the 695 students in his school liked best. Which choice BEST represents a representative sample?

• The girls in the school.

• 1 classroom for each grade

• All the students in the school.

• The students making a B in math.

If I wanted to know how many blades of grass are inside the track, which sampling method could I use?

• Have my students count every blade of grass

• Guess

• Divide the grassy area into 1 inch sections, randomly pick several sections to count, average them together and multiply that by the total square inches.