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The number of cases of tetanus reported in the U.S. during a single month in 1989 has a poisson distribution with a parameter of lambda= 4.5. 1. What is the probability that exactly one case of tetanus will be reported during a given month? 2. What is the probability that at most two cases of tetanus will be reported? 3. What is the porbability that four or more cases will be reported. 4. What is the mean number of cases of tetanus reported in a one month period? What is the standard deviation?
compute the hazard rate function of x when x is uniformly distributed over 0
Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence that the sample mean is within 8 IQ points of the true mean.
21 percent of the employees in a company have managerial positions, and 31 percent of the employees in the company have MBA degrees. Also, 66 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employee..
approximately 8.33 of men are colorblind. you survey 8 men from the population of large city and count the number who
Give a point estimate for the mean amount per customer spent at the supermarket and give a 99% confidence interval estimate for the mean amount per customer spent at the supermarket.
the first figure takes 5 matchstick squares to build the second takes 13 to build and the third takes 21 to builda how
Diamonds and Hearts are red and Clubs and Spades are black. Suppose you randomly select three cards from the deck. The outcome of interest is the colour of each of the selected cards.
sketch the area corresponding to the most extreme 1 of the standard normal distribution using the normal curve. find
Describe the claim, the experiment, the test statistic, and clearly state the null and alternative hypotheses. In fact, the outline of a good response looks like this?
a computer chip manufacturer rejects 6 percent of the chips produced because they fail to work properly when tested.
The accounting department at Weston reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours... Determine the z values for 29 and 34 hrs. What percent of garages take between 32 and 34 hrs to erect.
Telephone calls enter a college switchboard at a mean rate of 2/3 call per minute according to Poisson process. Let X denote the waiting time until the tenth call arrives. what are the moment-generating function, mean and variance of X?
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