
6.3 Confidence Intervals for Proportions
Flashcard
•
Mathematics
•
12th Grade
•
Hard
Bora Aslan
FREE Resource
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26 questions
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1.
FLASHCARD QUESTION
Front
Identify the confidence interval used in the figure below if each shaded area is equal to 0.05.
Back
90%
2.
FLASHCARD QUESTION
Front
The symbol for the sample proportion is __________.
Back
p̂
3.
FLASHCARD QUESTION
Front
What happens to the confidence interval when only 250 out of 325 people show up for a survey with a 95% confidence level?
Back
It gets larger
4.
FLASHCARD QUESTION
Front
A sample of 400 racing cars showed that 80 cars cost over $700,000. What is the 99% confidence interval of the true proportion of cars costing over $700,000?
Back
0.148 < p < 0.252
5.
FLASHCARD QUESTION
Front
95% confidence interval of the true proportion of women in Europe who use the Internet, given 35% of 750 users were women.
Back
0.316 < p < 0.384
6.
FLASHCARD QUESTION
Front
Interpret the 99% confidence interval (0.652, 0.868) for the proportion of students who went to the homecoming game.
Back
Based on this sample, I am 99% confident that the true proportion of people who went to the homecoming game this year is between 65.2% and 86.6%.
7.
FLASHCARD QUESTION
Front
Which confidence would result in a wider interval (assuming nothing else changed), 91% or 97%?
Back
97%, z* is larger for higher confidence intervals
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