Density function for a series of processes
The density function for a series of processes is fX (x) = 3/2x^2 for ?1 < x < 1. Choose 10 numbers independently from this distribution and find P(at least one is more than .5)
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The data is stored in Myeloma, and shown in the tab labeled 10.24, represent the bone marrow microvessel density for patients who had a complete response to the stem cell transplant (as measured by blood urine tests). The measurements were taken i
A manufacturer's quality conrol department is testing the number of steel beams that conform to national safety regulatons. Suppose that 1000 beams are tested, and each beam has a 0.1% chance of not conforming to regulations.
Data from previous years reveal that the distribution of the final exam scores in an introductory stats class is approximately normal with a mean of 23.2 out of 30 with a standard deviation of 4.94.
Two samples, each with n = 16 scores, produce an estimated standard error of 4 points and a t statistic of t = 2.00. What is the sample mean difference?
In order to be effective, reflective highway signs must be picked up by the automobile's headlights. To do so at long distances requires that the beams be on "high". A study conducted by highway engineers reveals that 45 of 50 randomly selected ca
The National Assessment of Educational Progress (NAEP) periodally administers tests on different subjects to high school students. In 2000, the grade 12 students in the sample average 301 on the mathematics test; the SD was 30. The likely size of
How many different linear arrangements are there of the letters A, B, C, D, E for which:
Use the Distribution Function method to find the c.d.f. and p.d.f. for Y_bar = (Y1+Y2)/2, the Average of the two lifetimes. Find the mean and variance of this average, using the answer in part (a).
In a study, the use of gloves among nurses was observed. Two populations of nurses were studied, those who were in the field 5 years or less, and those who were nurses for more than 10 years. Of those with 5 years or less experience, 98 observatio
Ten voters are randomly selected and asked if they will vote for the incumbent President. Five said yes and three said no. Two students are randomly selected with no replacement between the selections.
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