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What information would you need to consider, in order to make an informed decision?
National Reading Academy claims that graduates of its program have a higher median reading speed per minute than people who do not take the course.
In a study relating the amounts of time required for room service delivery at a newly opened Radisson Hotel, 20 deliveries had a mean time of 24.2 min and a standard deviation of 8.7 min. The sample data appears to have a bell-shaped distribution...
The following is the heart rate for 10 randomly selected patients on the unit. Find the mean, variance, and standard deviation of the data using the descriptive statistics option in the data analysis toolpak.
Which smoothing constant appears best from these results? Why? Could you perhaps get even better results given these outcomes?
We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of 20 observations having a sample mean of 8 and a sample standard deviation of 2. What is the standard error?
How can you tell for each of these? What could be another set of independent variables, if any, that could be added to better predict this relationship?
According to a national survey, the average commuting time for people who commute to a city with a population of 1 to 3 million is 19.0 minutes.
Determine the equivalent tax yield percentage. Which bond will give the client more profit after taxes? Municipal or Corporate bond.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. Noise level is defined as "Low" (under 88 ..
A teacher wants to know if students in her biology class did significantly better on an exam after instruction using authentic learning. The scores pre and post test are listed below. Based on an α = .05, what can the teacher conclude?
Gain follows the modern practice of using probability estimates of sales. The military division estimates its sales as follows. Find the standard deviation of the estimated profit, Z = 2000X + 3500Y.
for a lawyer 10 clients come to see her on average every day. the time of talking to each customer follows an
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