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Suppose that the probabilities of a customer purchasing 0, 1, or 2 books at a book store are 0.2, 0.3, and 0.5, respectively. What is the standard deviation of this customer's book purchases?
if np is greater than or equal to 15 and n1-p is greater than or equal to 15 what is the approximate shape of the
a basket of 1000 parts is selected at random from a shipment of 50 baskets. the chance of any single part being
a random sample of 20 items is selected from a population. to determine the appropriate critical t-value what number
A mean of 45 months and a standard deviation of 8 months. if a random sample of 600 batteries is selected, how many batteries would weigh last more than 48 months?
consider the uniform rectangular distribution on the space a b wherea lt b with p.d.f. fx 1 b - a a ltx lt ba obtain
an agricultural researcher plants 100 plots with a new variety of yellow corn. assume that the yield per acre for the
20% of their customers purchase package 3 and 25% of their customers purchase package 4. Find the expected value or average profit per customer.
The manufacturer wanted to determine if the tires were exceeding the guarantee. At the .05 significant level, it was concluded that the tires are exceeding the manufacturer's guarantee.
from experience a high-jumper knows that he can clear a height of at least 1.78 meters once in 5 attempts. he also
For the equation: x = e^-pt (C_1e^qt + C_2e^-qt), where C1 and C2 are arbitrary constants, if I let F = C1 + C2 and G = C1 - C2, how do I obtain:
The Water Authority informs Margaret that for a special fee of $6,000 this year, her farm will qualify for an additional allotment of 600 acre-feet of water. How should she respond?
A recent study by a large retailer designed to determine whether there was a relationship between the importance a store manager placed on advertising and the size of the store revealed the following sample information:
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