Two-Tail Hypothesis Testing and Confidence Intervals
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1. A certain type of cable was advertised as having a breaking strength of 1000 pounds. A test of XX pieces of this cable was conducted and the mean breaking strength of this sample was XXX pounds with a sample standard deviation of XX pounds. Conduct a two-tail hypotheses test at alpha = .05 to determine if this sample data provides sufficient evidence to indicate that the cable is as strong as advertised.
2. Conduct a 95% confidence interval on the sample data in the problem above.
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Solution Summary
A two-tail hypothesis test and a 95% confidence interval on sample data is conducted.
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1. Ho: The mean breaking strength of the cable is 1000 pounds.
Ha: The mean breaking strength of the cable is not 1000 pounds.
Test statistic:
If the sample ...
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