
Unit 6 Test Review
Authored by Cynthia Russo
Mathematics
12th Grade
CCSS covered
Used 6+ times

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18 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between a population and a sample?
A. A sample includes the entire group, while a population is a portion of that group.
B. A population includes the entire group, while a sample is a portion of that group.
C. A sample and a population are the same thing.
D. A sample must be larger than the population.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes sampling variability?
Different random samples from the same population can produce different results.
A sample always perfectly represents the population.
Random sampling eliminates all variability.
Sampling variability only occurs when a sample is biased.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of using a random sample?
To ensure that everyone in the population is included.
To reduce bias and make the results more generalizable.
To make calculations easier.
To get a larger sample size.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the best method for selecting a random sample of 50 words from a paragrph with 850 words?
Select the first 50 words of the paragraph.
Count up how many times words are repeated 50 times.
Assign each word a number and use a random number generator to select 50 words.
Select 10 words from each of the 5 sentences of the paragraph.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A survey estimates that the proportion of students who prefer online learning is between 46% and 52%. Based on this confidence interval, which of the following values is a plausible estimate for the true proportion of all students who prefer online learning?
44%
50%
53%
60%
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is bias in a study or survey a problem?
It makes it impossible to draw any conclusions from the study.
It can lead to misleading conclusions that do not accurately represent the population.
Bias only affects certain populations, so we just don't include them.
A biased study makes for silly results.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which variable is manipulated in an experiment?
Response variable
Confounding variable
Explanatory variable
Control variable
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