Small sample: Twenty concrete blocks were sampled and tested for crushing strength in order to estimate the proportion that were sufficiently strong for a certain application. Eighteen of the 20 blocks were sufficiently strong. Use the small-sample method to construct a 90% confidence interval for the proportion of blocks that are sufficiently strong. Round the answers to at least three decimal places. A 90% confidence interval for the proportion of blocks that are sufficiently strong is 0.79 T

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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Small sample: Twenty concrete blocks were sampled and tested for crushing strength in order to estimate the proportion that
were sufficiently strong for a certain application. Eighteen of the 20 blocks were sufficiently strong. Use the small-sample method
to construct a 90% confidence interval for the proportion of blocks that are sufficiently strong. Round the answers to at least three
decimal places.
A 90% confidence interval for the proportion of blocks that are sufficiently strong is
0.79 T<p< 1.01
Transcribed Image Text:Small sample: Twenty concrete blocks were sampled and tested for crushing strength in order to estimate the proportion that were sufficiently strong for a certain application. Eighteen of the 20 blocks were sufficiently strong. Use the small-sample method to construct a 90% confidence interval for the proportion of blocks that are sufficiently strong. Round the answers to at least three decimal places. A 90% confidence interval for the proportion of blocks that are sufficiently strong is 0.79 T<p< 1.01
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