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1. What is the difference between a marginal probability and a joint probability?
2. It is possible to have a sample space in which P(A) = 0.7, P(B) = 0.6, and P(A and B) = 0.35. Given this information, would events A and B be mutually exclusive? Would they be independent?
What is the expected number of Republicans who will win office in the coming election?
Distinguish between checklists and observational rating scales as ways to record behavior. When do researchers use each one?
Conduct a test of hypothesis to determine whether the average height of Australian boys who repeated a grade is less than the average height of boys who never repeated. Use α = .05.
a 6-faced die is rolled two times. let a be the event that the outcome of the first roll is greater than 4. let b be
One group was enquired, questions what they saw. One group was enquired, "About how fast were cars going when they smashed into each other?"
The Journal of Quantitative Criminology (Vol. 8,1992) published a paper on the determinants of area property crime levels in the United Kingdom.
the average hourly wage of workers at a fast food restaurant is 6.50hr with a standard deviation of 0.45. assume that
of 20 rats in a cage 12 are males and 9 are infected with a virus that causes hemorrhagic fever. of the 12 male rats 7
What is the current breakeven cost? What would happen to the breakeven point if we lower our fixed costs by $100,000 but increased our variable cost by $5 per unit?
a researcher randomly selects 6 fathers who have adult sons and records the fathers and sons heights to obtain the data
The baggage truck has a mass of 800 kg and is used to pull each of the 300-kg cars. Determine the tension in the couplings at and if the tractive force on the truck is F = 480 N.
A sample of 30 students are tested (sample mean=58, standard error=3.2). Compute a 99 percent confidence interval based on this sample's data. How do these students compare to the national sample?
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