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Suppose that airplane engines operate independently and fail with probability equal to 0.4. Assuming that a plane make a safe flight if at least one-half of its engines run, determine whether a 4-engine plane or 2-engine plane has the higher probability for a successful flight.
Share 1 real-world binomial distribution situation and 1 real-world Poisson distribution situation. Be sure to explain why each example is defined as binomial or Poisson.
Explain the distribution of mean of samples of size 15.
What is the difference between a one-tail and a two-tail test? How do we identify each? What is meant by a p-value?
What is the probability that a consumer selected at random: a. purchased fewer products than before? b. purchased the same number of products as before?
The mean score for freshman on an aptitude test at a certain college is 800 with a standard deviation of 50. That is the probability that two groups of students selected at random, consisting of 36 and 49 students, respectively, will differ in the..
A sample of n = 5 scores has a mean of M = 12. If one person with a score of X = 8 is removed from the sample, what will be the value of the new mean?
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 15 patients using the drug is selected. Find the probability that:
The number of shark attacks per year in the US is distributed approximately normal, with a Variance of 31.8 and a standard deviation of 10.
At the .10 significance level you will test to determine if there has been an increase in selling time. What is your decision?
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