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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:
A deck of ordinary cards is shu?ed and 13 cards are dealt. What is the probability that the last card dealt is an ace?
What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events.
A pkiggy bank contains 4 quarters, 3 dimes, 8 nickles and 9 pennies. What is the probability of randomly selecting a nickel?
A student takes a 16 question, multiple test with five choices for each question and guesses on each question. Find the probability of guessing at least 11 out of 16 correctly.
Create a histogram which shows the data in the range between -4 and 10. with class intervals of length 0.5 Make sure that your name and current date are also included in the histogram title on this
Given the monthly incomes for 16 randomly selected people with a bachelor's degree in business: Find the sample standard deviation.
Assume time to breakdown of a randomly chosen generator, Y, follows an exponential distribution with a mean of 15 days. (a) What is the probability a generator will break down in the next 21 day
If a player rolls two dice and get a sum of 3 and 11, she wins 30. if the person gets 7 she wins 15. the cost to play the game is 3. Find the expectation of the game.