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The average diastolic blood pressure of a certain age group of people is 85 mm Hg. the standard deviation is 6. If an individual from this age group is selected, find the probability that his or her blood pressure will be between 70 and 95. Assume normal distribution.
An industrial engineer at Lyons Products would like to determine whether there are more units produced on the afternoon shift than on the morning shift.
A sample of 10 persons is used to measure the effectiveness of two massage techniques. The effectiveness of the techniques is measured by the number of days that pass by before the subjects feel the need for another massage session.
Your friend is taking an algebra class that began one week after ours. Explain to your friend how to graph linear inequalities with two variables. Include at least two examples.
The chart at the right. Does this sample indicate that songs classified as dance music have lower beats per minute than the songs ranked on a Top 200 list?
A survey found that at most 40% of those surveyed planned to get more sleep. A sample of 300 people found that 140 of them plan to get more sleep. For alpha = 0.01, what is the critical value?
Based on the empirical data determine the following probabilities:
Dertermine the probability that a male is a Major or a Colonel?
Is the number of children that a college student currently has independent of the type of college or university being attended?
Computation of Expectation, Variance and Covariance.Calculate the variances of Y1 and Y2.
Random Sample Obtain (generate) a random sample of 180 numbers between 1 and 60. You may use a calculator, excel, or a table of random numbers to achieve this. Summarize your sample into a frequency distribution with 6 classes.
Compute a value V that enables us to state, with 90 percent confidence, that population variance (sigma^2) is less than V.
A human resources director, on learning about the regression effect, decides to hire people who have been fired by their previous employer for poor performance.
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