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From 8 names on a ballot, a committee of will be elected to attend a political national convention. how many different committees are possible?
Suppose a sample of 40 major league platers was taken. find the approximate probability that the average salary of the 400 players exceeded $1.1 million.
Explain whether you would retain or reject the Null Hypothesis that your sample comes from a population whose mean is 100. Use the alpha = .05 criterion.
With any statistical model, we assess the fit. Does the model accurately depict the truth? Explain how standard deviation helps to assess the "Fitness" of the mean.
Eleven chairs are numbered 1 through 11. Four girls and seven boys sit on these chairs at random. What is the probability that chair 5 is occupied by a boy?
A random sample of size 100 is taken from an infinite population having the mean μ=76 and the standard deviation σ=16. What is the probability of getting an x bar between 75 and 78?
What is the probability that exactly two customers arrive in the two hour period of time between 2:00pm and 4:00 pm (one continuous two hour period)?
The number of cracks in a section of interstate highway that are significant enough to require repair. What is the probability that at least one crack requires repair in 1/2 mile of high.
The number of cracks in a section of interstate highway that are significant enough to require repair is assumed to follow a Poisson distribution with a mean of two cracks per mile.
What are the main difference between the frequency distribution of continuous data and discrete data.
When you arrive in your new Chevrolet , there are already 7 cars in the lot. What is the probability that you can find two adjacent unoccupied spaces for your Chevrolet?
Explain the concepts of reliability and validity. Why are they important to research and statistics? How do we measure each of these? What happens if the questionnaire we use is determined to not be
Use the multiplication rule of counting to determine the number of different choices the sales representative has for the order in which to visit the cities.
SCCoast, an Internet provider, developed the following frequency distribution on the age of Internet users. Find the mean, median, and the standard deviation.
In correlation and regression we are examining relationships between two or more variables (i.e., ad spending and sales).
A drawer is picked at random and a ball chosen at random from the two balls in the drawer. Given that a gold ball was drawn, what is the probability that the drawer with the two gold balls was chose
What are the mean earnings of males and females in this sample? Does the regression result support the claim in the news?
How many seats must a train have to assure a probability of .99 or better of having a seat for each passenger?
Find the probability that a value randomly selected from this population will have a value greater than 130.
Let M be the minimum value of the Xj. Show that the density for M is exponential with mean µ/n. Hint: Use cumulative distribution functions.
A player wins 1 dollar if the number on the card is odd and loses 1 dollar if the number if even. What is the expected value of his winnings?
What decision should be made according to the maximax decision rule? What decision should be made according to the maximin decision rule?
Harvey has estimated caseload probabilities for the upcoming year to be 0.40 for "moderate", 0.40 for "high" and 0.20 for "very high".
Assume that the lock can also have combinations that require you to push two buttons simultaneously and then the other three one at a time. How many more combinations does this permit?
Using paper and pencil only, neatly create the Payoff Table and determine Harvey's optimal decision using the following decision criteria: