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Suppose that the a certain brand of light bulbs has a mean life of 600 hours and a standard deviation of 53 hours.
Using this information, what percentage of light bulbs will last between 547 and 706 hours.
the probability density function of the net weight in pounds of a packaged chemical herbicide is fx 2.0 for 49.75 lt
assume that 1300 births are randomly selected and exactly 331 of the births are girls. use subjective judgement to
estimating the percentage of youngsters between 16-0 driving
Ordinary regression line where the spread is assumed to be constant in all parts of the line. In practice, plot yi vs. xi from the sample and see what type of relation exists. When can a ratio estimator be used?
Grades my justifiably be quantified in the usual manner
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
An olympic archer is able to hit bull's-eye 80% of the time. assume each shot is independent of the others. if she shoots 6 arrows, what's the probability of each of these results? She gets at least 4 bull's-eyes?
you plan to invest 200000 in stocks on the toronto stock exchange. if you invest 2000 in any particular stock your
How would you define Incidence Rate
where the deviations εi are assumed to be independent and Normally distributed with mean 0 and standard deviation σ. This model was fit to the data using the method of least squares. The following results were obtained from statistical software.
One sample has SS = 48 and a second sample has SS = 32. When both samples have n =5, what is each sample variance and computed pooled variance?
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
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