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In a BMT class test the scores of 8 students are: 11; 10; 6; 3; 11; 10; 9; 11. Assume the sores are a simple random sample from a normally distributed population. What is the point estimate of the standard deviation?
Find the least-squares regression line for predicting yield from planting rate and add this line to your plot. Choose the correct equation for the least-sqruares regression line.
A random variable Y is uniformly distributed over a range of 0 to 2*pi. Another random variable X is related to Y by X=cos(Y).
What size sample would be required to estimate the proportion of unemployed college students if we want the margin of error not to exceed 5 percent?
Sample mean is 12.2 days and sample standard deviation is 10 days. How many personnel files would director have to choose to evaluate to within 2 days with 99% confidence interval?
A tetrahedron is a fully-symmetric pyramid-like solid, with four faces made up of equal-sized equilateral triangles. Suppose that the four faces contain different number of spots, from one spot to four spots, so that the tetrahedron may be rolled ..
The mean statistic test scores is 64 and the standard deviation is 6.0. For the biology test scores, the mean is 25 and the standard deviation is
The length of a particular telemarketing phone call, x, has an exponential distribution with mean equal to 1.5 minutes.
The cost for the conference room, instructor compensation, lab assistants, and promotion is $9,600. Micromedia rents computers for its seminars at a cost of $60 per computer per day. Question: find the breakeven point for this problem using Excel.
Use given data to create the unbiased point estimate of 12σ'> 2 of percentage of termites that are minor workers.
When carrying out a large sample test of H 0 : m =10 vs. H a : m ¹ 10 by using a p-value, we reject H 0 at level of significance α when the p-value is:
Captopril is a drug designed to lower systolic blood pressure. When subjects were tested with this drug, their systolic blood pressure readings (in mm of mercury) were measured before and after the drug were taken, with the results given in the ta..
The length of human pergnancies is aprox normally distibuted with a mean of 266 days and a standard devation of 16 days what is the probability the pregancy will last between 160 and 255 days?
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