Unit 10_lesson 1-3 review

Nicole wanted to determine the number of students in his school who buy school lunch. She walked around the cafeteria one lunch period looking to see whether every fifth person in the cafeteria purchased lunch or brought their own.

• Survey

• Simulation

• Experiment

• Observational Study

Which statement about the two-way frequency table is true?

• The survey represents quantitative data.

• There is a greater percentage of LA residents who own a car than NYC residents who do.

• The total number of people in the poll who own a car is 4,120.

• More people in the poll own a car than do not own a car.

Staff from the school newspaper is taking a poll to find out how students in the school are going to vote in the upcoming election for class president. Which group would best represent a sample population?

• Every tenth student staying after school.

• Every tenth student in the library at lunch.

• Every tenth student in the student section at the school football game.

• Every tenth student in the main hallway between class.

A cell phone company wants to determine the average amount of data that their smart phone customers use each month.

Which group would best represent a sample of the population?

• one thousand of their customers with the most expensive monthly plans

• one thousand of their customers who most recently signed up with the company

• one thousand of their customers with a current smart phone data plan

• one thousand of their customers who called in for technical support

Alejandro wants to determine the average shoe size of all of the male students in his school. Which sample is likely to yield the most biased results?

• every member of the boys’ basketball team

• every tenth boy on the school’s phone list

• every boy in a randomly selected ninth-, tenth-, eleventh-, and twelfth-grade gym class

• every fifth boy who walks through the front doors of the school in the morning

Which sample fairly represents the population? Check all that apply.

• measuring the heights of every fiftieth person on the school roster to determine the average heights of the boys in the school

• calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment

• observing every person walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glasses

• sending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the town

• taking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch

The ages of the people in attendance at the showing of an award-winning foreign film are shown below.

Which statement must be true according to the histogram?

• The data is symmetrical, showing that the majority of the attendees were between the ages of 30 and 50.

• The data is symmetrical, showing that the majority of the attendees were between the ages of 21 and 60.

• The data is skewed, showing that the majority of the attendees were between the ages of 30 and 50.

• The data is skewed, showing that the majority of the attendees were between the ages of 21 and 60.

The number of points that Shira scored each basketball game so far this season is shown on the dot plot.

Which statement must be true according to the dot plot?

• The data is skewed to the right and shows that she never scored fewer than 2 points or more than 12 points in a game.

• The data is skewed to the right and shows that she scored 11 points in more games than all of the other point values combined.

• The data is skewed to the left and shows that she never scored fewer than 2 points or more than 12 points in a game.

• The data is skewed to the left and shows that she scored 11 points in more games than all of the other point values combined.

Sal recorded the number of crackers in each snack-sized package he opened.

Which statement must be true according to the box plot?

• The data is symmetric, and the lowest number of crackers in a package was 7.

• The data is symmetric, and the lowest number of crackers in a package was 8.

• The data is skewed, and the lowest number of crackers in a package was 7.

• The data is skewed, and the lowest number of crackers in a package was 8.

There are 8 sophomores on the academic team. At the last competition, they each took the math test. Their scores were 82%, 92%, 76%, 72%, 92%, 74%, 80%, and 78%. What was the median math score of the sophomores?

• 79%

• 82%

• 87%

• 92%