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A survey found that Americans generate an average of 17.2 pounds of glass garbage each year. Assume the standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be between 17 & 18 pounds.
A financial analyst estimates that the probability that the economy will experience a recession in the next 12 months is 20%. She also believes that if the economy enters a recession
3 cards are randomly selected without replacement from an ordinary deck of 52 playing cards. Compute the conditional probability that the first card selected is a spade, given that the second and third cards are spades.
Suggest a target population. Who, exactly, are the "students" in question? Suggest a choice of sampling method and comment on why you have made this choice.
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
Three are selected, at random, without replacement from the batch. What is the probability that the third is not defective given that one of the previous two are defective?
The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees.
A single box contains 12 gloves, and it has been determined that 6 percent of gloves are defective. What is the likelihood that a box of gloves gets rejected?
I did a study correlating net profit per location with expenditures on an in-house promotion, and got a correlation of about .15, and that was received very well.
An electric power trading company has an option to buy 1,000,000 terawatts of electricity from a producer for $10 per terawatt. Other electric power trading companies have received this option and the company knows a decision must be made quickly.
Find the percentage of buyers who said their price range is between $150,000 and $153,300.
In 1851 there were 25,466 nurses in Great Britain. Find the probability that a British nurse selected at random in 1851 would be 60 years or older. (My guess is The sum of the percent of nurses 60 years are older are added equaling 36% or 1967.76/2..
Create probability tree showing all marginal, conditional, and joint probabilities. Create a joint probability table.
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