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A student scores 91 on the midterm exam for physics. Assume the class scores are normally distributed, with a mean of 65 and standard deviation of 15. Into what percentile does this student fall?
Four have a 4/10,000 chance for failure. One component has a 1/100 chance for failure. What is the overall reliability of the product?
They tested a random sample of 40 batteries using a special device designed to imitate real-world use and recorded data on battery lifetime. Determine the sample mean (in minutes).
The diameters of peaches in a certain orchard are normally distributed with a mean of 3.85 inches and a standard deviation of 0.42 inches. Show all work.
To determine whether there is a difference in the proportion of viewers watching the three channels.
One particular morning, the length of time spent in the examination room is recorded for each patient seen by each physician at an orthopedic clinic. Does the data prove a significant diference in mean times, using a=.05 Minutes in Examination roo..
Last year the records of Dairy Land Inc., a convenience store chain-What is the p-value? Follow the five-step hypothesis testing procedure.
Construct a 90% confidence interval for the standard deviation of the number of hours this firm's employees spend on work-related activities in a typical week.
Regression analysis works with the basic formula of a line, which is Y = mX + b. We can use it to look at causation. Think about the Lemonade Stand Game.
The scheduled commuting time on the Long Island Rail Road from Glen Cove to New York City is 65 minutes. Suppose that the actual commuting time is uniformly distributed between 64 and 74 minutes.
What is the marginal revenue equation? Find the output to the nearest thousand cameras that will produce the maximum revenue. What is the maximum revenue?
Compute the grouped data mean for this distribution. Use MINITAB and using the original scores, compute the raw-data mean. Use MINITAB.
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed.
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