Afair coin is tossed. if the toss results in a head, then one die is thrown, while if the toss results in a tail, then two dice are thrown.
let x denote the random variable that counts the number of spots showing on the thrown die or dice. the values that x x can assume are the positive integers from 1 to 12 inclusive.
find the following probabilities. your answers should be whole numbers or fractions in lowest terms.
pr(x=2)
pr(x=6)
pr(x=9)
pr(x=0)

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

Which scenarios are most effectively explored by conducting an experiment? there is more than one correct answer. select all that apply. researchers want to study the effectiveness of a particular drug for treating migraines. they want to know which dosage of the drug yields the best results with the least side effects. to ensure fair results, the researchers want to ensure that participants and dosage administrators do not know which dosage participants receive. a teacher wants to plan a class fieldtrip and quickly determine where students prefer to go for the class fieldtrip. a car mechanic wants to know which of two engine brands makes better-performing engines. he wants to test the engines in identical situations and rate their performance in a way that can be fairly measured. a chemist studies the properties of a metal compound. she wants to know how the sample size of the metal affects its ability to conduct electricity. she wants to conduct the research in a controlled environment to minimize bias. a realty company wants to know the average income of its clients. the company wants to gather data income from current clients.

Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below. the design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to construct a 99% confidence interval estimate of μ, the mean duration of game play. 4028 4316 4816 4650 4036 5010 4833 4331 4307