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Quality control studies for speedy jet printers show that the lifetime of the printer follows a normal distribution with an average life time of 3 years and a standard deviation of .78 years. the company will replace any printer that fails within 1 year after purchase. what percent of printers can be excpected to fail during the warranty period.
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Describe your re..
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
In forestry there appears to be a correlation between the diameter of a tree at breast height and the totol height of the tree. For the following sample of ten white spruces first construct a scatter plot then find the correlation (r) between heig..
Test whether the relationship between the plan at retirement and residential area using Chi square test.
20 students in a class - if there is a 15% probability that a randomly chosen member has seen a particular movie - what is the expected number of students have seen the movie?
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
A randomized controlled trial was designed to compare the effectiveness of splinting against surgery in the treatment of carpal tunnel syndrome.
Assuming that the first digit cannot be a zero, compute the number of possible outcomes when the digits can be repeated.
As an illustration, if contestant 1 obtains a smaller value than contestants 2 and 3 but contestant 4 has a smaller value than contestant 1 (X4 n) as a function of n.
Graph the p.d.f and show that the probability of the part failing in the first 200 weeks is 1/8
Why is it significant to be familiar with frequency distributions in the business world? Provide examples by using a distribution chart from a set of data.
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