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The probability that a household has a cat is 55%. Sixty percent of all households have a dog. Further, it is known that 25% of all households have both a cat and a dog. If a household is randomly selected, what is the probability that they have a cat or a dog? If a household is randomly selected and is known to have a dog, what is the probability that they also have a cat?
Groundwater contamination in wells. In New Hampshire, about half the counties mandate the use of reformulated gasoline.
Suppose that the weight (again, in units of 1,000 pounds) of a car is a random variable with mean 3 and standard deviation .3. How many cars would have to be on the bridge span for the probability of structural damage to exceed .1?
The lower limit for a 95% confidence interval for the population proportion if a sample of size 200 had a 40 success is.
A certain college gives aptitude tests in the sciences and the humanities to all entering freshmen. If X and Y are, respectively, the proportions of correct answers that a student gets on the tests in the two subjects, the joint probability distr..
Use the data presented in given Exercise to calculate the relative likelihood of accidents given that it is raining.- Below are some data to use in a chi-square test for independence. Calculate the degrees of freedom for this test.
If every member of a 10-cadet unit has no violations, then each will receive a weekend pass. What is the probability of this happening following a barracks inspection?
The population of car speeds is approximately normally distributed. Determine a 90% confidence interval estimate for the speed of all cars.
Confidence interval for the true mean and Evaluate the 95% confidence interval for the true mean advertising expense?
Sketch a scatter plot that could represent data from each of following. Label the axes to indicate the independent and dependent variable.
What is the variance of the Poisson distribution with the mean lambda?
discuss why the f-test and not the t-test is used in conducting the global test of coefficient in a multiple regression
The largest value in a set of data is 160, and the smallest value is 70. If the resulting frequency distribution is to have six classes of equal width, what will be the class interval?
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