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Suppose that in a certain population of adults who have sleep apnea (a sleep disorder), 74% are males, 26% are females, 83% are being treated for their sleep apnea, and 60% are males who are being t
According to the U.S. Department of Education, 42.8% of 3-year-olds are enrolled in day care. What is the probability that a randomly selected 3-year-old is enrolled in day care?
A 95 percent confidence interval for the mean of a population is (21.84, 40.56), based on a smaple of size of 22. Find confidence interval 90 and 99.
Unoccupied seats on flights cause airlines to lose revenue. Suppose a large airline wants to estimate its average number of unoccupied seats per flight over the past year. 225 flight records are ran
Two numbers are drawn successively at random with replacement from the set 0,1,2,3,4,5,6,7,8,9. What is the probability of the event E that these two numbers are the same?
Find the mean daily revenue. Assuming X1, X2, and X3 to be independant, find the standard deviation of the daily revenue.
A six-faced die is loaded in such a way that an even number is three times as likely to occur as an odd number. (The die is no longer `fair'.) If C is the event that an odd number occurs on a single
The bottom of a cylindrical container has an area of 10 cm^2. The container is filled to a height whose mean is 5 cm, and whose standard deviation is 0.1 cm. Let V denote the volume of fluid in the
You are 88 % certain the neighbor will remember to water the plant. When you return from vacation, the plant is dead. What is the probability that the plant died because your neighbor forgot to wate
A study compared music compact disc prices for internet-based retailers and traditional brick and mortar retailers. Before collecting the data, the researchers carefully defined several research hyp
A researcher conducts an experiment comparing two treatment conditions and obtains date with 10 scores for each treatment condition. If the researcher used an independent-measures design, how many s
Participants enter a research study with unique characteristics that produce different scores from one to another. For an independent-measures study, these individual differences can cause problems
A researcher conducts an independent-measures research and obtains t = 2.070 with df = 28. How many individuals participated in the entire research study?
The Census Bureau provdies estimates of numbers of people in the United States classified in various ways.
A normally distributed population of scores has µ = 100 and s = 5. Based on this information, solve the following questions:
Thus, for any given purchases occasion, there is a 55% chance that a consumer in the target market will select your brand (i.e. alpha).For this scenario, please answer the following questions. This
Give an example and also find an article that describes the statistical principle, everyone doing their best may not be the best.
A six-faced dice is loaded in such a way that an even number is three times as likely to occur as an odd number. (The dice is no longer `fair'.) If C is the event that an odd number occurs on a sing
In a sample of 1,000 representing a survey from the entire population, 650 people were form Laketown, and the rest of the people were from River City. Out the the sample, 19 people had some form of
What is the probability of reaching into the bin and getting a 4- inch nail? What is the probability of getting a 5- inch nail?
Each second a particle, which was initially at x = 0, jumps either left or right (each with probability 1/2) a distance a. At time tn = n the particle is at location xk = ka with probability P(n,k).
A group of engineering graduates took the licensure exam. 26% of them are females and 74% are males. 83% of these graduates passed the exam.
In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta restaurant, data were collected for a sample of 49 customers. Assume a population standard deviation of $5.
If a graduate is randomly selected, what is the probability that the person is a male or successfully passed the exam?
Ten cups of soup are brought with results of a mean of 5.93 ounces and a standard deviation of 0.13 ounces. How large a sample of soups would we need to be 95% confident that the sample mean is with