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A manufacturer of disk controllers subjects each new controllers to rigorous testing. Of newly assembled controllers, 84% pass the test with no rework. Controller that fail the initial test are reworked once; 75% of these machines pass a second test. Those controller that fail the second test are reworked the second time and retested; 90% of them pass and the test are scrapped. Define Y to be the number of rework cycles for a randomly chosen controller. What is the variance of Y?
Develop a 95% confidence interval for the proportion of the population of adults who feel customer service is better today than it was 2 years ago.
a study looked at the relationship between condom use and the spread of aids by following heterosexual couples in which
What kind of statistical test best did you use?
a random sample of 70 voters found that 40 were going to vote for a certain candidate. find the 99 limit for the
Considering all of the day to day activities you are engaged in at work and in your personal lives, write a 200 (or more) word paper that describes at least three (3) different statistical usages that you see regularly.
the claim is that the proportion of peas with yellow pods is equal to 0.25. the sample statistics from one experiment
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
Lewis earned 85 on his biology midterm and 81 on his history midterm. In the biology class the mean score was 79 with standard deviation 5.
regression anaylsis was applied between demand for a product y and the price of the product x and the following
What type of probability distribution is appropriate for this problem? Determine the probability of getting no calls between eight and nine in the morning. Calculate the probability of getting exactly five calls between eight and nine in the morning
blood type ab is found in only 3 of the population. if 290 people are chosen at random find the probability of the
A recent national study showed that approximately 30% of college students binge-drink. Let x equal the number of students in a random sample size of n=12 who binge drink. Find the probability that
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