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Tom parks his car at a meter without paying for 1 hour. A parking enforcement officer checks for parking violations an average of 3 times per hour. However, the officer's eyesight is poor and sometimes reads the meter incorrectly. Because of this, he writes a ticket for a violation only 80% of the time.
(a) What is the probability that the officer checks Tom's meter 4 times?
(b) What is the probability that the officer checks Tom's meter 4 times and gives him a ticket on the 4th time? (The officer did not give a ticket the first 3 times.)
suppose that a flaw in a certain computer chip installed in computers was discovered that could result in a wrong
The owner of Britten's Egg Farm wants to estimate the mean number of eggs laid per chicken. A sample of 20 chickens shows they laid an average of 22 eggs per month with a standard deviation of 2.03 eggs per month.
Decide if the events A and B are mutually exclusive or not mutually exclusive. A card is drawn from standard deck of 52 playing cards.
Assume that 89 percent of all batteries have acceptable voltages. Let Y be the number of batteries that must be tested until finding two acceptable ones. What is the probability that Y=6?
if the probability that event a occurs is 0.4 that event b occurs is 0.6 that event c occurs is 0.5 that both event a
organizations interested in making sure that accused persons have a trial of their peers often compare the distribution
a student team in a business statistics course wanted to determine if there was a difference in average download times
Using this information, calculate Blpha risk (probability of Type II error) if the true population mean really is 79.
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Describe the population of interest and calculate the numerical value of the statistic that that the EPA will use to estimate p. Construct a 95% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of ..
She has been a victim of domestic abuse at some point in her life. Find the probability that more than 22 of the women sampled have not been the victim of domestic abuse.
A recent national study showed that approximately 30% of college students binge-drink. Let x equal the number of students in a random sample size of n=12 who binge drink. Find the probability that
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