WorksheetsAdv Algebra Study Guide 1.1
Total questions: 15
Worksheet time: 13mins
An __________ study in which the researcher simply observes the subjects without interfering.
observational
experiment
random sample
population
In an ________, researchers separate the participants into a control group and a treatment group, and manipulate the variables to try to determine cause and effect. One of the key components of an experiment is that individuals are assigned to treatments and the results are compared.
population
experiment
observational study
random sample
The mayor of Bainbridge wants to know what the people in town think about the new monkey farm. Which procedure would be a good way to conduct a survey?
Answer questions from a radio broadcast.
Ask the audience at the BHS basketball game.
Send out an email to randomly selected people in the city.
Mail a questionnaire to randomly selected households in the city.
A study conducted an experiment with 3,500 children over 5 years to investigate whether an extra recess helps with academic performance. The study concluded that the students were 90% more likely to have better academic performance if they received an extra recess. Identify the sample.
all students in America
all students in GA
3,500 children in the study
90% of the children
A study conducted an experiment with 3,500 children over 5 years to investigate whether an extra recess helps with academic performance. The study concluded that the students were 90% more likely to have better academic performance if they received an extra recess. Identify the population.
all students in Puerto Rico
all students
3,500 children in the study
90% of the children
An example of an experimental study is a researcher observes for thirty days how four
year-olds interact with each other in a classroom setting. Is this statement True or False?
True
False
An example of an observational study is a researcher records the feeding behaviors of South GA Bluejays. Is this statement True or False?
True
False
A teacher distributes a survey asking, "Do you think using graphic organizers are the most effective way to take notes in this class?" Identify a potential source of bias in the survey results.
The survey uses a leading question that could influence students' responses.
The survey should include more questions about note taking.
Students may not be familiar with all note taking strategies.
Students may have different preferences for note taking methods.
Aislinn needs to obtain a random sample of 20 students from her school, in order to do a project for her statistics class. Which method would be BEST for doing this?
Choose 20 students who are in the sports program
Randomly selected 20 girls and 20 boys from the girls' and boys' soccer teams
Choose the first 50 students she sees in the hallway after leaving lunch.
At the next school assembly, choose one student from each of 30 randomly selected rows of seats.
Stand outside the nurse's office one morning before school and choose the first 35 students she see going in.
Jordan wants to select a random sample of 25 students to participate in a survey about school lunches. Which method would be BEST for obtaining this sample?
Choose 25 students who are members of the school band
Randomly select 25 students from the list of students who attend after-school clubs
Pick the first 25 students who enter the cafeteria at lunchtime
Take a roster of all students and randomly pick 25 names from that list.
Stand by the library entrance and select the first 25 students who walk in
The sign of the z-score indicates whether the location is above (positive) or below (negative) the mean.
True
False
Find the Z-score.
Mean = 22
Standard Deviation: 3.1
x = 29
2.26
16.45
-2.26
1.26
Use the image of the normal graph provided. What is the value of the mean?
6
34
52
70
What value is located at the peak (center) of a normal distrubution curve?
percentage
z-score
mean
standard deviation
The bell curve is the shape of a normal distrubution curve. Is this statement True or False?
True
False
