

Sample Size and Confidence Intervals
Interactive Video
•
Mathematics, Education, Instructional Technology
•
9th - 12th Grade
•
Practice Problem
•
Hard
Lucas Foster
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of using Desmos in this lesson?
To calculate the mean and standard deviation
To perform hypothesis testing
To determine the sample size needed for a confidence interval
To create graphs for data visualization
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the margin of error specified by the political candidate?
2%
4%
5%
3%
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the z-score for a 95% confidence level?
2.58
2.33
1.96
1.64
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What assumption is made about the sample proportion when no information is given?
40% support, 60% don't support
60% support, 40% don't support
70% support, 30% don't support
50% support, 50% don't support
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which function in Desmos is used to find the z-score?
Standard Deviation
Inverse CDF
Mean Calculation
Normal Distribution
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula used to calculate the sample size 'n'?
n = (z * (1-p)) / e^2
n = (z^2 * p^2) / e
n = (z^2 * p * (1-p)) / e^2
n = (z * p) / e
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What value is used for 'p' in the sample size formula when no prior information is available?
0.9
0.7
0.5
0.3
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