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A researcher is working with a group of participants, of whom are female and of whom are male. The researcher will select one participant from the group at random, and then she will select a second participant at random from the remaining participants. What is the probability that two males will be selected?
A "one-shot" device can be used only once; after use, the device (e.g. a nuclear weapon, space shuttle, automobile air bag) either is destroyed or must be rebuilt.
compute a 95 confidence interval for the population mean based on the sample 1 2 3 4 5 6 and 39. change the number from
if the invasive tree known as european buckthorn is randomly distributed in a degraded forest at a rate of 5 trees per
Using a test, 80% of Down's Sydrome cases can be identified, while 5% of normals are detected as positive. What is the sensitivity and specificity of the test?
1. an international marketer has said when political instability increases the price of quality increases. think about
a statistician employed by a consumer testing organization reports that at 95 confidence he has determined that the
Assume the population standard deviation of unoccupied seats for all flights for this airline is equal to 4.103. Find a 90% confidence interval for μ and the mean number of unoccupied seats
the centers for disease control and prevention reported a survey of randomly selected americans age 65 and older which
a biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the
From a random sample of 50 employees who resigned from the state university system over the past 5 years, the average time between the termination date and reimbursement was 75 days, with a standard deviation of 15 days. Use the data to estimate t..
Correlation between Cost and Calories (correlation coefficient, the significance of the correlation coefficient, i.e., p-value, and sample size are reported)
suppose x is uniform on 01 and y x. find the joint distribution function of x and
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