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A recent report by the American Medical Association stated the average annual salary of psychiatrists is $189,121 with a population standard deviation of $26,975. A group of hospital administrators randomly sampled 64 psychiatrists and found and average salary of $198,630. The group claims that the average annual salary is actually higher than what the American Medical Association reported. What is the P-value for this one-sided test?
An airline finds that 5% of the persons making reservation on a certain flight will not show up for the flight. If the airline sells 180 tickets for a flight with only 175 seats,
of employees in a particular industry 60 are female. if employees are selected one at a time stopping as soon as a
Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams (7.165 pounds) and standard deviation 550 grams (1.213 pounds). Those weighing less than 2500 grams (5.512 pounds) are considered to be l..
According to US Census Bureau, 7.1% of all births to non-smoking mothers are of low birth weight (
Develop a probability distribution for the number of travelers who plan their trips within two weeks of departure.
why is the coefficient of correlation an important tool for statisticians? provide some specific examples from real
Suppose that the census indicates the average American earns $36,345.45 per year. You are interested in the whether people who majored in political science earn an amount that is different than the average American.
Derive the probability distribution of the completion times - For each of the distribution in (i) above, calculate their relevant statistics. A task is known to have the following time to completion
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data.
While 60 of the children's books are nonfiction. If a book is selected at random, find the probability of selecting the following not a children's nonfiction.
Develop a point estimate of the number of minutes per day officeworkers waste trying to locate mislabeled, misfiled, or misplaced items.
For a sample with standard deviation of 10, a score of X = 44 corresponds to z-score of 0.50. Based on this info, determine the sample mean?
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