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The life span of an imported brand of kettles sold by an appliance giant is normally distributed with a mean of 96 months and a standard deviation of 12 months.
1. What percentage of these kettles will last between 90 and 110 months?
2. The appliance giant offers a replacement guarantee on kettles which malfunction within a certain time of the purchase, but due to financial constraints, can only afford a maximum of 5% replacements. What must the guarantee period be?
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
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the manager of a soda bottling plant is interested in comparing the performance of two bottling machines the old
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Interpret the estimated coefficient for the toxemia variable and what are the odds of a hemorrhage for infants whose mother had toxemia?
Suppose that the scores of architects on a particular creativity test are normally distributed.What percentage of architects have Z scores. (a) above .10, (b) below .10
The factorial structure of treatments. What does this plot recommend about suitability of no-interaction assumption here?
What is the purpose of a post-hoc test with analysis of variance? What is probabilistic equivalence? Why is it important?
Cars pass a certain street location according to a Poisson process with rate λ. A woman who want to cross the street at that location waits until she can see that no cars will come by in the next T time units.
The forecast for the third quarter is 3,000 units; the seasonal index for the quarter is 1.05. What are the seasonally adjusted sales for the quarter?
We would like to test if the proportion of respondents that support the health care bill is less than 50% (a) what kind of hypothesis test is appropriate?
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