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The time between surface finish problems in galvanizing process is exponentially distributed with a mean of 40 hours. A single plant operates three galvanizing lines that are assumed to operate independently.
a. What is the probability that none of the lines experiences a surface finish problem in 40 hours of operation.
b. What is the probability that all three lines experience a surface finish problem between 20 and 40 hours of operation.
In government data, a household consists of all occupants of a dwelling unit, while a family consists of two or more persons who live together and are related by blood or marriage. So all families form households, but some households are not famil..
Find a 95% confidence interval for the long-run proportion of new product placements?
Significant increase in the mortality of lung cancer in both genders, but no significant effect was observed at lower levels." Is this an observational study or an experiment? Fully explain your reasoning.
The managers of a brokerage firm are interested in finding out if the number of clients a broker brings into the firm affects the sales generated by the broker.
How would you use the concept of probabilities to apply to profiles for hiring more satisfied individuals?
Suppose that the probability distribution of a random variable x can be described by the formula. Calculate the variance and standard deviation.
Researchers routinely choose an -level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower -level (e.g. 0.01)?
Would one make clear (summarize) the differences between the following and when they are used or what they are applied to.
In case of fire, the probability that D1 operates correctly is 0.95 and the probabilty that D2 operates correctly is 0.92. Find the probability that the sprinkler system will come on.
According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $63,091 and the median household income was $50,054.
Make your calculation supposing a two-sided two-sample t-test with a type I error (alpha) of 0.056
If the mean systolic blood pressure is 130 and the standard deviation is 8, find the upper and lower readings that would qualify people to participate in the study.
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