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A physicians' group is interested in testing to determine whether more people in small towns choose a physician by word of mouth in comparison with people in large metropolitan areas. A random sample of 1,000 people in small towns reveals that 850 chose their physicians by word of mouth; a random sample of 2,500 people living in large metropolitan areas reveals that 1,950 chose a physician by word of mouth.
Conduct a one-tailed test aimed at proving that the percentage of popular recommendation of physicians is larger in small towns than in large metropolitan areas. Use α = 0.01.
the incomes in a certain large population of college teachers have a normal distribution with mean 75000 and standard
A coin is tossed100 times. Estimate the probability that the number of heads lies between 40 and 60. NB: use the Central Limit Theorem.
When using the normal distribution (empirical rule) to obtain the bounds for 99.73 percent of the value in a population, the interval generally will be ______the interval obtained for the same percentage if Chebyshev's theorem is assumed., shorter..
You are the designer for your company's web site. You have data to indicate that the mean download time for the homepage is 5.8 seconds and that the standard deviation of download time is 2.1 seconds.
Given that the advertising made a person more likely to try the product, what is the probability that the person is a man (show your work)?
What is the probability the measure makes a correct diagnosis. (think about what constitute a correct diagnosis, so not detecting something when there's nothing there would count as well)
a genetics lab wants to alter a species of mosquitoes so that the mean life span becomes shorter. to test whether their
to compare the effects on energy intake of drinking wine either before or with a meal 11 men participated in a
A polling company obtains an alphabetical list of names of voters in a precinct. They select every 20th person from the list until a sample of 100 is obtained.
The carative factors of transpersonal care establish a trusting relationship built on faith and hope for positive health outcomes (Cara, n.d). The ten "caritas" Watson referred to were defined as: · Embrace altruistic values and Practice ..
you are given a loan on which interest is charged over a 4 year period as followsan effective rate of discount of 6 for
Causal relationship between voter policy preferences and the voting behaviour of members of congress. What questions would you want to ask before you took this assertion seriously?
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