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Question:
Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that three or four customers will arrive during the next 30 minutes?
Sstandard deviation was found to be 3.3 minutes. Is there evidence to reject the manager's claim at alpha =.02? Perform an appropriate hypothesis test.
An internet company has redesigned its website to improve the online experience of its customers. To test whether the new design has improved its customers' experience it has asked people to comment on whether they prefer the new format or not.
one environmental group did a study of recycling habits in a california community. it found that 72 of the aluminum
The factorial structure of treatments. What does this plot recommend about suitability of no-interaction assumption here?
The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.
a researcher is studying the relationship between earnings for major electronic firms and research and development
what is the density of the sum of 3 unform -11 distributions. use 3. to simplify calculations. sketch the plot. how
a sample of n 9 has a mean of m 72 with ss 162. use the sample to make a point estimate of u and to construct the 90
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
The company uses two cost driver rates for allocating manufacturing overhead costs to job orders: one on the basis of machine hours for allocating machining department overhead costs and the other on the basis of direct labor cost for allocating t..
In a sample of 80 mail carriers 16 had been bitten. At the 0.05 level of confidence, is there a significant difference in the proportions?
weights of pacific yellowfin tuna follow a normal distribution with mean weight 68 lb and standard deviation 12 lb. a
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