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According to College Board, mean quantitative SAT score for male college-bound high school seniors in 2009 was 530. SAT scores are approximately Normally disstributed with population standard deviat
A discrete random variable is said to be uniformly distributed if it supposes a finite number of values with each value occurring with same probability.
Assume that you arrive at the bus stop five minutes early. Determine the probability that the bus arrives after you get to the bus stop?
Determine the equation of the regression line. What is the predicted value when x=4? Is the correlation significant at 5% significance level (95% confidence level)? Why or why not?
Determine an estimate of the proportion defective when the process is in control? Determine the standard error of the proportion if samples of size 100 will be used for statistical process control? Ca
A student organization surveyed both current graduates and current students to obtain infromation upon the quality of teaching at a particular university.
We are estimating the spares requirement for a radar power supply. The power supply was designed with a mean (u) life of 6500 hours. The standard deviation determined from testing is 750 hours. What
Determine the mean, standard deviation, and shape of the distribution of the sample proportion p-hat of parents who say the genders are equal and should have equal opportunities?
The following table reports prices and usage quantities of three products for the years 2005 and 2006
Assume X and Y are two independent Poisson random variables with and as their parameters. Show that X+Y is also Poisson with lambda 1 and lambda 2 as the parameter.
Amy plans to put the total of eight books upon her shelf. She has seven different textbooks and seven different fiction novels. The shelf should contain at least four of the textbooks and at least
A population of 35 year old females in Dayton, OH has a mean salary of $45,000 with standard deviation of $2,500. If sample of 100 women is taken, determine the probability that their mean salaries
If many samples of 64 were selected, determine mean and standard error of the mean (standard deviation of sample means) expected to be? What is expected to be the shape of the distribution of sample
The arrival of packets is stated by a Poisson process with a rate of 100 packets per second.
Compute the number of ways the committee of 3 women and 4 men can be selected from group of 6 women and 8 men if 1 specifc woman (call her W1) and 1 particular man (call him M1) must be on the commi
Economic situations cause fluctuations in the prices of raw commodities and in finished products. Let X denote the price paid for a barrel of crude oil by initial carrier, and let Y denote the price
Determine the margin of error for a 99% confidence interval for this sample? Determine the lower endpoint for the 99% confidence interval?
Which of the following is true regarding the standard error of estimate?
Describe, and confirm, a procedure for using a real coin to create a virtual fair die.
The probability of the jet fighter surviving combat mission is 0.8 and three fighters are required for the success of the mission. How many fighters must be sent on the mission in order to achieve a
What is a Black Swan event? How is this related to a power law or pareto distribution? What is the 80-20 rule? How does the tail of a power law compare to the tail of a normal distribution?
A television sports commentator desires to determine the proportion of citizens who "follow professional football." Complete parts (a) through
The average age for licensed drivers in county is µ= 42.6, = 12 and the distribution is approximately normal. A county police officer was interested in whether the average age of those receivi
Determine the mean number of deaths from horse kicks per regiment-year? Test whether a Poisson distribution fits these data.
The profit for the new product is given by Z=3x-2y+5. x and y are independent random variables with V(x)=2 and V(y)=3. what is the variance of Z?