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A hospital accrediting agency reported that the survival rate for patients who had coronary bypass surgery in tertiary care centers was 93%. A sample of community hospitals had an average survival rate of 88%. Were the survival rates for the two types of hospitals the same or different?
what is the probability two individuals chosen at random from a classroom of 30 students are both females if there are
suppose the time to prepare a bed at a hospital is modeled with a random variable with a mean of 20 mins and a variance
An entrepreneur owns two hotels, one in the western region of a certain state and the other in the eastern region. He thinks that the average amount spent by guests for lunch at his Friendly Café-West is less than $34.50
The following sample data were obtained from three populations where the variances were not equal, and you wish to compare the populations.
suppose you were given the task of estimating the proportion of drivers in troy al who text while they drive. discuss
Create a 95%confidence interval for the value of the population mean, given that their is a sample mean of 49 and a standard deviation of 3 but now found those valuesfrom a sample of only 20 observations.test the hypothesis allowing for type 1 error ..
in the manufacturer sector the types of items measured for example average call times product weights container volumes
the central limit theorem says that when a simple sample of size n is drawn from any population with mean ? and
What is the formula is for a population with a mean of u=60 and a standard deviation of sigma=24. Find the z score corresponding to the sample m=63 for a sample of n =16 scores,.
ABC Manufacturing has six machines that perform particular task. Breakdowns happens frequently for this machine. Past records indicate that the number of breakdowns that happen each day is described by the probability distribution seen below:
Levels above 200 warrant attention. If 95 teenage boys are examined. How many would you expect to have cholesterol levels greater than 225.
in a typical sports playoff series two teams play a sequence of games until one team the eventual winner has won four
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