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In a region, 70% of the population have brown eyes. If 10 people are randomly selected, find the probability that at least 8 of them have brown eyes. Is it unusual to randomly select 10 people and find that at least 8 of them have brown eyes? Why or why not?
The probability that at least 8 of the 10 people selected have brown eyes is _____? (Round to 3 decimal places as needed)Is it unusual to randomly select 10 people and find that at least 8 of them have brown eyes? Note that a small probability is one that is less than 0.05
a) No, because the probability of this is occurring is very small.b) Yes, because the probability of this occurring is not small.c) Yes, because the probability of this occurring is very small.d) No, because the probability of this occurring is not small.
Give a real world example of a situation where normal parametric tests would not be useful and where there is a need for nonparametric test methods. Be specific and explain why nonparametric tests are needed in that case.
Construct the 90% confidence interval for the true population proportion of all voters in the state who favor approval.
Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
Determine the oucomes in the sample space, and construct a probability distribution table. Find the expected value of the following game.
q. a teacher gave a 25 question multiple choice test. after scoring the tests she computed a mean and standard
Which statement is true for a statistical study?
The port of Trop can service only 1 ship at a time. However, there is mooring space for 3 more ships. Trop is a favorite port of call, but, if no mooring space is available the ships have to go to the next port.
A person makes random guesses for 10 true-false questions on a test. Find the probability that the student answers at least one question correctly.
A random variable is binomially distributed with n = 16 and π = .40. The expected value and standard deviation - find the sample size to estimate the mean with an error of ± 4 and 95 percent confidence (rounded to the next higher integer).
1. according to the yankee group 53 of all cable households rate cable companies as good or excellent in quality
A study of Furniture Wholesales, Inc. regarding the payment of invoices reveals the time from billing until payment is received follows the normal distribution.
If they would like to estimate the true average time to within 1.9 minute (with 95% confidence) what sample size should they use? (remember to round to the next largest integer.)
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