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Let X be the number of-days in month picked at random from the 12 months of a year (not a leap year).
a) Display the distribution of X in a table, and calculate E(X) and SD(X).
b) Repeat with X the number of days in the month containing a day picked at random from the 365 days of 1991.
A venture capitalist invests in one firm of each type. Assume the companies function independently. What is the probability that both companies become profitable?
in a study of hypnotic suggestion 16 male volunteers were randomly allocated to an experimental group and a control
An automobile insurance company estimates the following loss probabilities for the next year on a $25,000 sports car:
Write the event "at least one nonword error" in terms of X. What is the probability of this event? Describe the event X ≤ 2 in words. What is its probability? What is the probability that X
a) What is average number of trucks (to the nearest 0.1 trucks) in the unloading system? b) What is average time per truck (to the nearest 0.1 minutes) in the system?
a seven-year medical research study reported that women whose mothers took the drug des during pregnancy were twice as
wayne collier designed an experiment to measure the fuel efficiency of his family cat under different tire pressures.
A production line is producing window hinges for an automotive company. The weight in kilograms of these parts is very close to the maximum
A political pollster is conducting an analysis of sample results in order to make predictions on election night. Assuming a two-candidate election.
An estimate of the percentage defective in a lot of pins supplied by a vendor is desired to within 1% with a 90% confidence level.
Using the 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?
Enlarged to 14 measurements, by including two additional measurements having a common value of 40 each. Find the standard deviation of the sample of 14 measurements.
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