Statistics Review

A computer randomly selects members of the band to determine whether they should wear school initial or the school logo on their uniforms in the upcoming competiition. He finds the band members prefer to wear the school logo. What type of sample is this?

• Simple Random Sample

• Stratified Random Sample

• Systematic Random Sample

• Voluntary Sample

• Convenience Sample

To evaluate whether customers enjoy the barista’s new coffee flavor, a restaurant manager surveys every 12th customer who orders the new coffee. The manager determines that customers enjoy the new coffee. What type of sample is this

• Simple Random Sample

• Stratified Random Sample

• Systematic Random Sample

• Voluntary Sample

• Convenience Sample

A teacher wants to know most students in the school's favorite subject. The teacher surverys their first period class. Is this a biased or unbiased sample? A valid or invalid conclusion? (Select all that apply)

• Biased

• Unbiased

• Valid

• Invalid

A town is organizing a summer festival. The planners want to have enough gift bags for every person who attends. Out of 200 people randomly surveyed, 47 said they would attend the festival. How many gift bags should the planners prepare if there are 2,800 people in the town? 

An environmental scientist collects data on fish in a large lake. She finds that 26% of all the fish have an infection. Predict how many fish have an infection if 900 fish are in the lake. 

To determine the destination of the senior-class trip, the class president polls her senior friends from the lacrosse team. She finds that an amusement park is the preferred destination.

• Systematic Random Sample

• Simple Ramdom Sample

• Stratified Random Sample

• Convenience Sample

• Voluntary Response Sample

To determine whether a new elementary school should be built, the school board emails surveys to parents who volunteer in the school district.

• Systematic Random Sample

• Simple Random Sample

• Voluntary Response Sample

• Convenience Sample

• Stratified Random Sample

A high school principal is planning to start a new elective class. He randomly surveys 60 students to ask whether they would take the class, and 7 said they would. How many students can the principal expect to take the class if there are 540 students in the high school?

A teacher is planning on buying materials for a project all her classes will complete. She randomly surveys 24 students about what method they will use to present their project. 11 students will use poster board. How many poster boards can the teacher expect to buy if she has 96 students in total?