Random Sampling

Lana and Jeff each randomly surveyed 15 students about their favorite types of movies. What would you expect to see in the samples? Select all that apply.

• Different members are found in each sample.

• Some members may possibly overlap in each sample.

• Each sample gave the same responses.

• Both samples could be representative of the population.

• Both samples include only Lana and Jeff's friends.

The principal at Marina Middle School wants to determine if the 120 students in the seventh grade prefer to visit Catalina Island or Camp Mosaic for their end-of-year trip. Which of the following is a representative sample of the population? Select all that apply.

• 20 sixth-grade students, 20 seventh-grade students, and 20 eighth-grade students

• 10 seventh-grade boys and 10 seventh-grade girls

• 25 seventh-grade students

• 15 seventh-grade boys and 5 teachers

• 25 students from the school

If you choose 5 bingo balls from a basket of 50 balls, what sampling technique are you using?

This is the most commonly seen distribution pattern. Example: wolves. This is usually because there are resources found in particular areas and the organisms need more space to survive.

• random

• clumped

• uniform

Tags

NGSS.MS-LS2-1

How do you ensure that the quadrat is placed randomly?

• Throw the quadrat into the field.

• Place the quadrat near where you are standing.

• Divide the area into a grid and choose the coordinates.

• Divide the area into a grid and use a random number generator to select coordinates.

Poole wants to know how students at OV rate the school lunch. I surveyed my IB Psych class to rate the food. Is this a biased sample of the school's population?

• Yes because it is a convenience sample. The sample is asking a very specific group that may not accurately match the population.

• No, the IB Psych class has the smartest students and the best foodies.

• Yes, because it is a voluntary survey that only interested students took.

• No, Poole should have asked the culinary class since have more experience with food.

Tags

NGSS.HS-LS3-3

A beverage company wants to see if people in the United States like their new logo. Which of the following would be the best selection for a sample.

• 2,000 middle school students

• A selection of logo designers

• A selection of shoppers from different states

• All of the people in the United States

a bird that can easily outcompete other birds for food and that can produce many eggs has a high

• life expectancy
• mutation rate
• fitness
• adaptability

Tags

NGSS.MS-LS1-4

NGSS.MS-LS4-4

In what year did the RMS Titanic sink?

• 1926

• 1945

• 1912

• 1918

Q2: what is defined by the following: "how well a test measures what it is purported to measure"?

• Accuracy

• Precision

• Reliability

• Validity

Tags

NGSS.HS-PS4-4