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A coin is weighted in such a way that the probability of it landing heads is 1/3. You toss the coins 6 times. find the probability that you tossed at least 2 heads out of your 6 tosses
Using the 0.05 level of significance, is there evidence that the population mean is above $300? What is your answer in (a) if s = $90 and the 0.10 level of significance is used?
birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz.
In trying to estimate the amount of growth that took place in the trees recently planted by the county parks commission
a computer center has three printers a b and c which print at different speeds. programs are routed to the first
Suppose that five escalator riders are selected at random. What is the probability that three of the five take at least 2 minutes and 20 seconds to ride the escalator?
For all 12 people, the time to complete Task 1 (T1) and the time to complete Task 2 (T2) (in minutes) were recorded. After collecting the data, a 95% confidence on the difference (T1 - T2) in average time to complete the tasks was found to be (-2...
Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of $92. Assume that the following questions about the cost of a hospital emergency room visit for this medical service.
Consider the following simultaneous equation model where Y1 and Y2 are endogenous variable while X1, X2, X3 and X4 are exogenous variables:
consider two random variables x and y. suppose that the variance of x is 20 that this of y is 10 and that the
Can we conclude that there is a difference in number of citations written between the officers? Use the 0.05 level of significance.
What's the expected value of sample information? How much might the physicians be willing to pay for a market study?
The mean height of women in a country (ages 20-29) is 64.3 inches. A random sample of 70 women in this age group is selected.
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