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There are 40 fishes in a pond. You capture 20 of them for an experiment, mark them, and release to the pond. An experiment took place 10 days, then you recapture 20 fishes at random in the pond. Assume that the fishes neither new born or died in the 10 days. For 0 ? k ? 20, find a probability that there are k marked fishes in your selection.
For the population with mean of (u)=50 and standard deviation of (o)=10, how much error on average would you expect between sample mean (M) and population mean for given samples
paleomagnetic studies of canadian volcanic rock known as the carmacks group have recently been completed. the studies
1. the length of time in minutes required to complete a series of physical therapy exercises is normally distributed
Die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal maximum of two observations and let Y equal minimum. Determine joint pmf of X and Y, and correlation coefficient. Are X and Y independent?
at the instant shown the angular velocity of links be and cf is 6 rads counterclockwise an is decreasing at the rate of
A research firm conducted a survey to determine the mean amount people spend at a popular coffee shop during a week. They found the amounts spent per week followed a normal distribution with a population standard deviation of $4.
Create a hypothesis and perform a series of tests to determine if there is any fundamental difference in the findings.
assume that the time required to download a file from the itunes is exponentially distributed with mean equal to 4
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
q1. within the first six months of the new advertising campaign mccain was able to double its sales goal of a 15
a large industrial firm allows a discount on any invoice that is paid within 30 days. of all invoices 10 receive the
Hits on a personal web site occur quite infrequently. They occur randomly and independently with an average of five per week.
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