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A cable manufacturer has historically averaged 2.6 flaws per 1000 meters length of wire production. a. Find the probability that a 1000 meter length of wire has one or fewer flaws b. Find the probability that a 1000 meter length of wire has more than one flaw c. Find the mean number of flaws per 1000 meter length of wire, the variance and the standard deviation d. generate the graph of the probability mass function for the number of flaws in 1000 meter of wire e. Suppose you examine a 1000 meter length of wire. What is the probability that there is exactly 1 defect in the fisrt 500 meters and exactly 2 defects in the second 500 meters of wire? What is the probability that there are exactly 3 defects anywhere in the 1000 meters of wire? Do your two answers "make sense"? Please exolain.
Ask 20 men thier weight and use excel to calculate the mean. test the hypothesis that the mean is not 172 pounds at the .10 significance level.
What is the probability of randomly selecting a male from this group?
What is the probability that all three lines experience a surface finish problem between 20 and 40 hours of operation? Why is the joint probability density function not needed to answer the previous questions?
When the results are collected, two of the students discover that their condence intervals dont even overlap. A student in the course who is also taking Stat 311 claims that this result is not surprising. Do you agree?
The distribution of bladder volume in women is approximately N(400,75) in milliliters. Find the proportion of women's bladders with a volume between 500 and 600m.
R1 signifies the first Poisson event time after m (or 1 if there are no Poisson events in [m,1]), then it would be learned that marked position lies between L1 and R1.
In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected. Find the probability that: exactly three will have this mild side effect.
The store manager is under impression that his sales people do more business if they score higher on the social skills test which was administered this year. 5 victims were selected at random. Below, the results are X =test score, Y =weekly sales ..
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
Suppose you take a sample of size 100 of test scores and find that the mean is 63. What is the z-score corresponding to this sample mean?
To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within plus-or-minus 0.04 of the population proportion, how large a sample size is required?
Compute the coefficient of correlation and the coefficient of determination and determine the regression equation.
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