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Question: An allergy drug has been tested and found to give relief to 75% of the patients in a large clinical trial. Now the scientists want to see if the new, improved version works even better. What would the null hypothesis be?
From a population of cereal boxes marked "12 ounces," a sample of 16 boxes is selected and the contents of each box weighed. The sample revealed a mean of 11.7 ounces with a standard deviation of 0.8.
Suppose 91% of all Australian households having a fax machine have a personal computer. A Australian household is randomly selected. What is the probability that the household has a fax machine and a personal computer?
?(a) What is the probability of randomly selecting 1 woman with a height less than 66? inches?
A student wanted to study the ages of couples applying for marriage licenses in his county. He studied a sample of 94 marriage licenses and found that in 67 cases the husband was older than the wife.
the strength of ones immune system can be evaluated in several ways. one of the most popular methods involves measuring
a at a local car dealership the probability of a salesman making a car sale to a customer is 0.4. the probability
A group of 200 adults aged 21 to 50 were selected from those entering Fit Right Health stores in Washington State, and were randomly divided into two groups. One group was given a herb and the other a placebo. After 6 months, the number of respira..
1. Consider an in?nite server queuing system in which customers arrive in accordance with a Poisson process with rate λ, and where the service distribution is exponential with rate μ. Let X(t) denote the number of customers in the system at time t. F..
Given a standardized normal distribution? (with a mean of 0 and a standard deviation of? 1)
what is the critical f value for a sample of 9 observations in the numerator and 6 in the denominator? use a two-tailed
What conditions (if any) on the probabilities and the branches will get the third and fourth moments of one step to agree with those of Brownian motion across the same time step?
Show the sampling distribution of the mean amount of Medicare spending for a sample of fifty 2003 enrollees.
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