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Using the table of continuous data below, how would I compute the 25th, 50th, and 75th percentiles?
Show that the distribution of a random variable X with possible values 0, 1, and 2 is determined by /-li = E(X) and /-l2 = E(X2), by finding a formula for P(X = x) in terms of /-li and /-l2, x = 0,
How would I go about creating the following frequency distributions for the scores? Ungrouped, relative, cumulative, and cumulative relative frequency distributions. I want to include exact limits i
A fair coin is flipped until heads or tails have occurred twice in a row. Find the expected number of flips. Show all work.
Assume that I have a variable with a sample mean = 10, and sample n = 50. And let's say that the population standard deviation for the variable = 3. How would I create a 95% confidence interval arou
For a parallel structure of identical components, the system can succeed if at least one of the components succeeds. Assume that components fail independently of each other and that each component h
The article "Evaluation of Criteria for Setting Speed Limits on Gravel Roads" measured speeds of vehicles on several roads in the state of Kansas. On South Cedar Niles, 73 vehicles were observed, an
What proportion of sales personnel is expected to sell at least 5 and at most 12 cars during the 40-day period? What is the chance to sell fewer than 12 cars during the 40-day period?
Tasks are sent to a supercomputer at an average rate of 6 tasks per minute. Their arrivals are modeled by a Binomial counting process with 2-second frames.
Compute the variance, standard deviation, range, and coefficient of variation. Are the data skewed? If so, how?
Determine the FCF (Free Cash Flow) for the 5 year forecast period. Determine the present value of this 5 year forecast period.
The following is a series of annual sales (in millions of dollars) over an 11-year period (2000 to 2010): Year: 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Sales: 13.0 17.0 19.0 20.0 20.5
A trucking firm delivers appliances for a large retail operation. The packages (or crates) have a mean weight of 294 lb. and a variance of 2401. (Give your answers correct to four decimal places.)
A new cellular phone billing plan cost $15 per month plus $1 for each minute of use. If the number of minutes you use the phone in a month is a geometric random variable with expected value 1/p, wha
A recent survey indicated that the average yearly salary of middle school teachers in Wichita, Kansas, is 45,000 with a median of 38,000. Is this salary distribution normal? If not, which direction
An investigator at a diet center is interested in the habits of clients entering his center's weight loss program. Given the pairs of observations below, where X = number of hours per week spent wat
In clinical trials a certain drug has an 8% success rate of curing a known disease. If 8 people are known to have the disease. What is the probability of:
A population has a standard deviation of 22 units. (Give your answers correct to two decimal places.) Find the standard error for the mean if n = 14.
What is the probability that the officer checks Tom's meter 4 times and gives him a ticket on the 4th time? (The officer did not give a ticket the first 3 times.)
A box contains 18 working transistor and 7 defective transistors. You select 5 transistors from this box and solder them onto a circuit board. If you solder any defective transistors onto the circui
Assume a flipping a coin has a 50 - 50 chance of heads or tails. You flip a coin until the first time it comes up tails. What is the probability that it will take exactly three flips.
The time X it takes to reboot a certain system has Gamma distribution with E(X) = 20 min and Std(X) = 10 min. Compute parameters of this distribution.
In a recent survey of 1000 U.S adults, 19% are concerned that their taxes will be audited by the Internal Revenue Service. The surveys margin of error is plus or minus 3%. Translate the statement in
An electronic fuse is produced by two production lines in a manufacturing operation. Assume that both production lines are independent and produce fuses at the same rate and the probability of a de