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Assume the accidents occur at random according to a Poisson process a rate of one every two days.
a) What is the probability that exactly two accidents will occur in a particular two-day interval?
b)What is the probability that one will have to wait at least two days to observe the next two accidents.
A new group comes along and that only has 5 people. Their weights are also measured initially and after 9 weeks. What would be the most accurate methodology for determining the percentage of weight loss for this new group?
Professor Smith's statistics midterm had a mean of 85 and a standard deviation of 8. If a student got a score of 73, what was the student's standardized (z) score? What is the probability of a normal random variable taking a value more than 1.6 sta..
a sample of sales records for jmk shows the average revenue per day is 4275 with a standard deviation of 720 following
How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when using a 95% confidence interval?
when is it appropriate to use an anova? what is the key piece of information you must know in order to
The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees (n = 474) and their starting salaries.
Firm wishes to choose a small sample of driving distances from the past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
the door on the computer center has a lock which has five buttons numbered from 1 to 5. the combination of numbers that
in the table below x number of bad checks and px is the p that x bad checks will be passed in a
A researcher claims that the average age of people who buy theatre tickets is 51. A sample of 30 is selected and their ages are recorded as shown below.
researchers found a correlation coefficient of r .50 on personality measures for identical twins. a reporter
The average score on math portion of SAT was 516 in 2002. Assume that the math score of all students taking the SAT 2002 were normally distributed with a mean of 516 and a standard deviation of 90.
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