Statistical Samples

What statistical question could have been asked to gather the data found in this line plot?

• How many dogs do the students in the class have?

• How old are the dogs in the dog pound?

• What is the weight of the dogs in the neighborhood?

• What type of dog do the families in class have?

_______ is a part of a group being surveyed.

• Sample

• Population

• Random Sample

• Quartile

True or False: all samples lead to a good prediction about an entire population.

• True

• False

The town counsel wants to poll all the businesses in town on their store hours. They receive letters from 73 businesses in town.

• 73 businesses who return the letters

• All businesses in town

What is a representative sample?

• A sample that includes every member of the population.

• B sample that reflects the distribution of the population in terms of center, shape, and spread.

• C sample taken from a specific subgroup of the population.

• D sample that is taken randomly without any specific criteria.

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.

A student wants to know which type of pizza the students at his middle school prefer. Which option would give a unbiased, representative sample:

• Asking all the students in the hot lunch line.

• Asking 10 random students from each homeroom.

• Asking every other student who gets off a school bus.

• Asking all the 8th graders.

A student wants to know which type of pizza the students at his high school prefer. Which option would give an unbiased, representative sample:

• Asking all the students in the hot lunch line.

• Asking 10 random students from each homeroom.

• Asking every other student who gets off a school bus.

• Asking all the 10th graders.

There are 45 people working in a particular building. A survey on dietary habits is conducted by giving every third person in the building a questionnaire to fill out. From the questionnaire, the researcher obtains a score on the dietary habits of the 15 people.

What is the number of members in the population?

Mathematical Equivalence

ON

Choose the statistical question:

• What time did you wake up this morning?

• What time do sixth graders typically wake up during the school week?

• What time does school open its doors for students to enter?