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You manage a staff of 15 people in an insurance office. You have noticed that several of the employees are taking longer and longer coffee and cigarette breaks. When you recently called a meeting at 1 PM, the same employees were late to the meeting due to an extended lunch. This was not the first time this has happened. Everyone in the department knows this is going on and are waiting for you to do something. What do you do?
the diameters of grapefruits in a certain orchard are normally distributed with a mean of 5.96 inches and a standard
the computer anxiety rating scale cars measures an individuals level of computer anxiety on a scale from 20 no anxiety
This semester a sample of 55 students revealed an average cost of books of $415 per student. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
Create probability tree showing all marginal, conditional, and joint probabilities. Create a joint probability table.
Because television audiences of newscasts tend to be older (and because older people suffer from a variety of medical ailments) pharmaceutical companies' advertising often appears on national news in the three networks (ABC, CBS, and NBC). The ads..
A random sample of 85 group leaders, supervisors, and similar personnel at General Motors revealed that, on the average, they spent 6.5 years on the job before being promoted.
Laura wanted to build a multiple regression model based on advertising expenditures and coffee times price index. Based on the selection of all normal values she obtained the following:
If f is upper semicontinuous on a compact space S, show that for some t ∈ S, f (t ) = sup f := sup{ f (x ): x ∈ S}. Hint: Let an ∈ R, an ↑ sup f . Consider f -1((-∞, an )), n = 1, 2,... .
What level of measurement allows for the ranking of data, a precise difference between units of measure, and also includes a true zero?
I want to estimate within $10 the mean salary of all graduates who were business majors in college. How many business majors would be needed to estimate the mean salary to within 10 with 95% confidence if the population standard deviation is $200.
A student takes weekly quizzes in a course and receives the following grades over 12 weeks. Plot the data in a scatter plot with X = week and Y = grade.
Draw the normal curve model for auto fuel economy, following the 68-95-99.7 rule. Clearly label the X-axis with the mpg for the appropriate points.
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