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A large tank of fish from a hatchery is being delivered to a lake. The hatchery claims that the mean length of fish in the tank is 15 inches, and the standard deviation is 5 inches. A random sample of 28 fish is taken from the tank. Let x be the mean sample length of these fish. What is the probability that x is within 0.5 inch of the claimed population mean? (Round your answer to four decimal places.)
Suppose the time it takes a customer to get and pay for seats at the ticket window of a baseball park is a random variable with a mean of 100 seconds.
Hypertensive experimental (n=100) is 14%, placebo (n=100) is 22%. Generate a 95% Confidence interval for difference in proportions of patients with hypertension between groups.
Suppose that A and B take turns in tossing a biased coin which lands heads with probability p. Suppose that A tosses first.
Nonverbal communication (e.g., the use of hand gestures) is a common form of human expression . Some researchers believe it may even help people make quicker.
The superintendent of a large office complex, upon evaluating 30 of the units recently purchased and finding their mean power consumption to be 805 watts, claims that her shipment does not meet company specifications. At the 0.05 level of signific..
A study of accounts receivable at the A&W Department Store indicates that bills are either current, one month overdue, two months overdue, written off as bad debts, or paid in full.
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
usfec rents the flatbed trailers on which the organizations participating in the parade build their floats. the
Suppose we are studying climate change and we collect data on the average annual temperature and the number of pirates in the world in each year
find the 95 confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers
There are only two goods, x and y. Bob's preferences for x and y can be represented by the utility function U(x,y) = 24x - 0.5x^2 +12y - y^2. Bob has a choice.
All the customers who entered a store on a particular day were given a surgery to fill out concerning their opinions of the service at the store? What type of sample is this? I can't decide between voluntary response or convience.
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