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Suppose the amount of cosmic radiation to which a person is exposed folows normal distributioin with a mean 5.853 and standrad deviation 1.361. What is the probability that the person will be exposed to more than 8.625 units of cosmic radiation?
Assuming that the first digit cannot be a zero, compute the number of possible outcomes when the digits can be repeated.
A farmer in South Carolina must decide which crop to plant next year on his land: corn, peanuts, or soybeans. The return from each crop will be determined by whether a new trade bill with Russia passes the Senate.
You are using a significance level of α = 0.05 to test a claim that p > 0.5. Your sample is a simple random sample of size n = 49. Calculate β for the test, assuming that the true population proportion is 0.7 and showing all work.
Suppose that 46 percent of families living in a certain country own a car and 18 percent own an SUV. The Addition Rule might suggest, then, that 64 percent of families own either a car or an SUV. What's wrong with that reasoning.
State appropriate null and alternative hypotheses. Report the test statistic, its degrees of freedom, and the P-value. What do you conclude?
A doctor believes that the standard deviation of systolic blood pressure is 450. A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and a = 0.01. What are the critical values?
If 15% of the suitcases are overweight, find the maximum weight allowed by the airline. Assume the variable is normally distributed.
Sample standard deviation s=4.8. what is a point estimate off the difference between mean annual consumption in Webster City and the national mean?
Someone tells you that 50% of the tickets in the box show positive numbers. Do you believe it? Answer yes or no, and explain.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
the estimate of the population proportion is to be within plus or minus .05 with a 99 percent level of confidence. the
If person is selected at random and tested, determine the probability of that person having an IQ score between 85 and 115. Make use of EXCEL to help determine the probability.
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