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A transportation company operates 200 trucks and would like to use a hidden speed monitor device to record the maximum speed at which a truck is operated during the period that the device is installed.
The trucks are driven primarily on interstate highways, and the company wants to estimate the average maximum speed for its fleet with 90% confidence and within 2 miles per hour. Using (and explaining) your own estimate for the population standard deviation, determine the number of trucks on which the company should install the hidden speed-recording device.
What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? What is the probability that a randomly chosen stock investor also invests in fixed income instruments?
according to the consumer electronics manufacturers association 10 of all u.s. households have a fax machine and 52
Suppose a large number of questionnaires about educational accomplishments are mailed out. Do you think that some recipients will be more likely to return the questionnaire than others? Which ones?
What kind of study was this?- Is that an appropriate choice for this problem?- Who were the subjects?- Identify the treatment and response variables.
Find the probability that at least 3 will malfunction.- no more than 5 will malfunction.- at least 1 but no more than 5 will malfunction.
Can you give any advice to a committee working on a problem that might help it to arrive at a decision? How should the discussions be structured? Can sensitivity analysis help in such a situation; if so, how?
In a clinical study of an allergy drug, 115 of the 204 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level, test the claim that more than half of all those using the drug experience relief.
Do prices appear to be the same in the four markets? Explain.- Does the presence of any outliers affect your overall conclusions about prices in the four markets?
East and West: for this discussion, please discuss the cultural differences between the two and how those differences were exacerbated by historical events. How much of the east-west rift remains as a part of global culture today?
a study conducted at a certain college shows that 55 of the schools graduates find a job in their chosen field within a
Suppose a random variable has some PDF given by fx(x). - Find a function g x such that Y g(X) = is a uniform random variable over the interval (0 ,1) .
Find the equation of the least squares regression line that models the relationship between square footage and rental amount and interpret the meaning of the coefficients.
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