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Determine the probability that this customer isn't a student? The manager claims that about half the customers ask for extra hot sauce. Do you agree?
A company manufactures altimeters. A simple random sample of 81 altimeters is tested and errors in altitude are found to have a standard deviation of 52.3 ft. At 0.05 significance level, test the cl
In a sample of 47 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Find the P-value for a hypothesis test to determine whether
A sample mean, sample size, and population standard deviation are given. Employ the one-mean z-test to perform the required hypothesis test about the mean, µ, of the population from which the
The maximum acceptable level of certain toxic chemical in vegetables has been set at 0.3 parts per million (ppm). A consumer health group measured level of chemical in random sample of tomatoes obta
If you randomly chosen 9 boxes of Smackin good cereal, which probability that their MEAN weight is less than 19.5 ounces?
The waiting times in minutes were: 10, 12, 20, 15, 17, 10, 30, 28, 35, 28, 19, 27, 25, 22, 33, 37, 14, 21, 20, and 23. Suppose ? = 8.94. Find out the 95% confident interval for population mean.
Let X be number of times heads comes up when a fair coin is tossed 30 times. Which one of the following statements is false?
A random sample of 140 forty-year-old men contains 25% smokers. Find the P-value for a hypothesis test to determine whether the percentage of forty-year-old men that smoke differs from 22%.
Find out the sample size required to assure with 95 percent confidence that the sample mean will not differ from population mean by more than 2 units.
Listed below are body mass indexes (BMI) for current Miss America winners. Employ a 0.01 significance level to test the claim that recent Miss America winners are from population with mean BMI less
Suppose that distribution of average college graduates is a bell shaped curve. A random sample of 13 students has the mean salary of $35,000 and standard deviation of $5,000. Make a 95% confidence i
Suppose that the probability of giving birth to a baby boy is 0.5. Find out the probability of giving birth to at least 180 boys when survey was conducted on 300 pregnant women. Draw appropriate gra
Show that the above situation satisfied all four criteria for binomial probability distribution. Find out the probability that more than two patients or less or equal to 5 patients are cured.
Suppose that you're ivesting $10,000 in one bond. There are two kinds of bonds available. The first bond provide you a 7% return rate with a default rate of 3% and second bond gives you return of 9%
Then the sample is removed, the counter is reset, and background is measured to be 3442 events in 20 minutes. Determine the best estimate of the count rate due to the sample only? What is your uncer
A quantity x is carefully measured 25 times and the best value is determined to be xbest = 11.0 ± 2.0. How many total measurements would be needed to reduce the uncertainty to less than &plus
As you know that the CDF (comulative distribution function) is continuous from the right.
Twelve people go to the store. Eight people buy apples, six students buy oranges, and two students buy nothing at all. What is the probability that the people who bought apples also bought oranges?
A real estate developer is considering investing in the shopping mall on outskirts of Atlanta, Georgia. Five parcels of land are being evaluated. Of specific importance is the income in area surroun
For a particular known population, the mean is 100 and the variance is 25. A researcher conducts a study in which 10 participants are exposed to an experimental procedure. To test the hypothesis tha
Dividing the variance of the population of individuals by the number of individuals in each sample gives:
The tobacco industry closely monitors all surveys which involve smoking. One survey showed that among 785 randomly chosen subjects who completed four years of college, 18.3% smoke.
Discuss how the power of hypothesis test is affected by each of the following. Suppose that all other factors are held constant.