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In 1969, Ken Thompson of AT&T Bell Labs was looking for a computer to create what, eventually, became the fi rst Unix system. He found an unused PDP-7 minicomputer, which he was able to use. Suppose Thompson had not found the PDP-7. Would we have Unix today?
Is this an ideal data collection method? Can the results be considered reliable? Can the gathered data be representative of the population?
A researcher is interested in studying the relationship between certain driving habits and type of vehicle. He hypothesizes that signaling behavior will be different for drivers of trucks and cars.
a debt collection company has been monitoring the amount of time its bill collectors spend on calls that produce
Suppose we analyzed the effect of grade point averages on grades in a specific class and found the results to have an R-aquared value of 0.53. What do we know? Are there other factor, neith or fifty three percent of the variability?
three committees of 5 people each will be formed from a group of 15 people where each person is allowed to be on
A class contains 30 students. Ten are female (F) and U.S. citizens (U); 12 are male (M) and U.S. citizens; 6 are female and non-U.S. citizens (N); 2 are male and non U.S. citizens. A name is randomly selected from the class roster and it is female..
models of the pricing of stock options often make the assumption of a normal distribution. an analyst believes that the
Bakery is a random variable X that has an exponential distribution with mean equal to 4 tons. The cost of the flour is proportional to Y=3X+1.
suppose that prior to conducting a coin-flipping experiment we suspect that the coin is fair. how many times would we
oh reports that it takes construction workers a mean time of 32 hours and a standard deviation time of 2 hours to
question a bank recorded the number of atm transactions made by its customers in one day. the number x of daily atm
a biologist wishes to estimate the effect t of an antibiotic on the growth of a particular bacterium by examining the
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