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A traffic intersection is known for "rolling stop" violations. In an attempt the reduce the number of violaters. two police officers hide near the intersection and wait to write up tickets for violaters. Based on past expierence its know that 80% of people perform rolling stops.
A) Compute the probability that the 4th car to approach the intersection is the first rolling stop violator. (round to 3 decimal places
B) over any 3 hour interval, 5 people on average will perform a rolling stop. Compute the proboility that less than 2 people will perform a rolling stop between the hours of 12 AM and 3 AM. (Round to three decimal places)
C) After one evening, 16 different drivers have passed through the intersection. Compute the probobility that at least 15 drivers perfomred a rolling stop. (Round to three decimal places)
If out of a random sample of college students expressed an intent to vote, can the aide's estimate be rejected at the level of significance? Perform a one-tailed test.
Although this critique was later discarded, how does user error affect the marketplace. When I buy my morning coffee at Starbucks, the cup warns me: "Careful, the beverage you are about to enjoy is extremely hot."
Let X be a random variable of the continuous type that has pdf f(x). If m is the unique median of the distribution of X and b is a real constant, show that E(X - bl) = E(X - ml) + 2 [(b - x)f(x) £lx, provided that the expectations exist.
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
Shown below is computer ouput for a regression analysis relating Y (demand in units) and X (unit price).
Which confidence interval has the most variability?
one of the major measures of the quality of service provided by an organization is the speed with which the
Find the probability that among 8 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.
Using this information, calculate Blpha risk (probability of Type II error) if the true population mean really is 79.
A parameter is a population characteristic. The numerical value of a parameter usually cannot be determined because we cannot measure all units in the population. We have to estimate the parameter using sample information.
A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 first-time users of a new statistics program revealed the mean time to learn it was 39 hours with the standard dev..
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