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You will choose from the pull down menu at the bottom of the page both the number of dice and the number of rolls at a time.
A computer supply house receives a large shipment of floppy disks each week. Past experience has shown that the number of flaws per disk can be described
As a sample size approaches infinity, how does the student's t distribution compare to the normal z distribution?
Why is population shape of concern when estimating a mean? What does sample size have to do with it?
Implications of the Central Limit Theorem (assume sample size larger than 30 when samples are mentioned in (a) and (b) below).
What is the sampling distribution of sample means?
The mean weight of newborn babies in a Long Island Community is 7.5 lbs with a standard deviation of 1.4 lbs. What is the probability that a random sample
Assume that the distribution of heights of adult American men is normally distributed with mean 69 inches and standard deviation 2.8 inches.
The following are marks obtained by a group of 40 students on an English examination:
Suppose a fair coin is tossed n times. The probability of obtaining head and tail are the same because this is a fair coin.
The driving distance for the top 100 golfers on the PGA tour is between 284.7 and 310.6 yards (Golfweek,March 29,2003).
Let f(x)= 1/3, -1
A manufacturer of flashlight batteries wishes to control the quality of its product by rejecting any lot in which the proportion of batteries
You are told that the continuous random variable X is exponentially distributed with parameter a (a > 0).
Jeru is having a debate with his classmate about whether various random variables are considered discrete or continuous.
The median annual income for college graduates with a bachelor's degree is $37,700(the New York Times Almanac, 2006) Data (in thousands of dollars)
What is the mean number of rolls of a die before a 1 is observed? Roll a die until a 1 is observed.
The time it takes for a student to finish an aptitude test has the density function
Probability Density function, Probability distribution, and Probability
A fair coin is tossed four times and X is number of heads on first three tosses and Y on last three. What is the joint probability mass function of x and y
Provide an example of how to set up the integral ranges to find a particular probability area.
A density function sometimes used by engineers to model length of life of electronic components is the Rayleigh density, given by if 0 < y1 <8
Adapted from Larson, Intro. to Probability Theory, 1969) A nursery specializes in the installation of circular flower beds.
A particle is distributed along the positive x axis with a probability density
The number of failures of a unit from contamination particles on the unit is a Poisson random variable with a mean of 0.02 failures per hour.