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A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control engineer has been checking the output by almost continuous sampling since the abnormal condition began. What is the probability that in a sample of 10 pieces:
That exactly 5 will be defective? That 5 or more will be defective?
If the weight distribution is known to be normally distributed, do the data support the veterinarian's suspicion? Conduct a hypothesis test at the 5% significance level. Define your parameter (μ), state your hypotheses, conduct the test and write ..
Use Chebyshev's theorem to find what percent of the values will fall between 241 and 349 for a data set with a mean of 295 and standard deviation of 18.
Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05
The population standard deviation is σ2 = 7. Test that the population means differ using a 1% significance level.
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
The manager of the Gander Mountain store in Frogtown, IL, believes that his prices for ammunition are lower than the prices of his primary competitor in the hunting equipment market, Cabela's.
Has the average community level of suspended particles for the month of August exceeded 30u/m3?
Explain how the Central Limit Theorem can help you convince your boss that while you can't get rid of sampling error the results from your statistical work (that is based on sampling) can still be useful.
Multiple choice questions based on regression - multiple coefficient of determination
The monthly income of residents of Dayton is normally distributed with a mean of $3000 and a standard deviation of $500.
Create the indicated confidence interval for population mean µ using a t- distribution.
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
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