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WorksheetsRandom Sampling
Total questions: 20
Worksheet time: 14mins
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?
(a)
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
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.
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
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
True or False:
You want to see how many students take the bus home from school. You go to the bus stop and ask students how they get home everyday. This is a good, representation of the population.
True
False
Question 4
Purple Ammo
Special Ammo
Medium Ammo
Nitro Ammo
The only number that has the same number of letters as its meaning
4
2
5
0
Limpets were found in 25 out of 50 quadrats. What is coverage percentage of limpets?
50%
25%
75%
100%
Based on the results of this survey, which elective was least popular and should be canceled?
Spanish
Theater
Art
A researcher selected a sample of 𝑛 = 120 from a population of 850 by
using the Table of Random Numbers
Simple Random
Systematic
Stratified
Cluster
