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Suppose you just received a shipment of thirteen televisions. Three of the televisions are defective. If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
Research has shown that the people often see a correlation between two events when one does not really exist. Why do you think this happens?
How many ways can she choose 4 dissimilar rides if order does not matter? If she has chosen the first weeks rides, how many ways can she choose four more different rides for second week? Suppose that order does not matter.
One table has a standard deviation of $50 while the other has a standard deviation of $150. What conclusion can be drawn from the data?
A laboratory scale is known to have a standard deviation of = 0.001 gram in repeated weighings. Scale readings in repeated weighings are normally distributed, with mean equal to the true weight of the specimen.
A professor receives, on average, 24 emails from students the day before the midterm exam. To compute the probability of receiving at least 10 emails on the next day before the midterm she would use which probability distribution?
Using suitable probability model, calculate the probability of producing more than 3 faulty chips per hour.Explain the reasons for choosing your probability model.
The 260 business majors and 100 students from the 180 political science majors. Does this sampling plan result in a random sample? Simple random sample? explain."
Using the critical value approach and the sample information reported below, carry out a test of this statement. Let α = 0.05.
What is the difference between a null hypothesis and an alternate hypothesis? Explain what is meant by the critical value of a statistical value.
Use Hypothesis testing to determine if Dr. Boom is correct, that his sample of 25 rockets weight less than the average rocket.
Describe meaning of alternatives, criteria and states of nature. Explain how are they utilized in decision analysis?
Find the probability that a random selected score is between 150 and 157. If a sample of size n = 100 is randomly selected, find the probability that the sample mean will be between 150 and 157.
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