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A random variable is normally distributed with a mean of 25 and a standard deviation of 5. If an observation is randomly selected from the distribution:
a. What value will be exceeded 10% of the time?
b. What value will be exceeded 85% of the time?
Find the area under the normal distribution curve to the right of z = -1.03.
Determine the p-value; and at 95% confidence, test the above hypotheses.
Describe your answer to a person who has never had a course in statistics.
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
Probability of two mutually exclusive events intersecting Can be any value between 0 to 1, Must always be equal to 1.
The random variable xi represents the number of complaints, and p(xi) is the probability of receiving xi complaints.
Determine the probability in big class that both sections are covered? Only one section? Neither section? Determine the expected number of sections covered?
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
Evaluate z statistic for the Wilcoxon rank sum test, standard deviation for the Wilcoxon rank sum test and P-value for the Wilcoxon rank sum test
Recognize the given samples are independent samples or matched pairs.
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
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