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In a health study, the dietary habits of 420,000 men were examined over a 3-year period. For those who ate no fried foods, the death rate was 1208 per 100,000 man-years. For men who consumed fried foods more than 15 times a week, the corresponding rate was only 702.
Considering that the relative ages of members of these two groups were not mentioned, critique the internal validity of the experiment.
How many social robots would need to be sampled in order to estimate the proportion ofrobots designed with legs, no wheels to within .075 of its true value with 99%confidence
Determine the conditions under which you would use a discreet probability distribution rather than a continuous probability distribution
consider a poisson probability distribution in a process with an average of 3 flaws every 100 feet. find the
Records show that 13% of all college students are foreign students who also smoke. It is also known that 25% of all foreign college students smoke. What percent of the students at this university are foreign?
The article "Feeding Ecology of the Red-Eyed Vireo and Associated Foliage-Gleaning Birds" (Ecological Monographs, 1971: 129-152) presents the accompanying data on the variable X = the number of hops before the first flight and preceded by a fligh..
Suppose 10 balls, numbered 1-10, are to be distributed randomly into 10 boxes. a) What is the probability all 10 balls are placed into one box? b) What is the probability that no boxes are empty?
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
The mean SAT verbal score is 412, with a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 412 and 592. (Assume the data set has a bell-shaped distribution.)
How do the graphical and computer-based methods of solving LP problems differ? In what ways are they the same? Under what circumstances would you prefer to use the graphical approach?
between 525 and 550 of them (inclusive) will result in twins being born?
(a) For the same data and null hypothesis, is the P-value of a one-tailed test (right or left) larger or smaller than that of a two-tailed test? Choose one
we are interested in testing whether the standard deviation of a population 1 is significantly greater than the
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