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Question: Suppose you have to cross a train track on your commute. The probability that you will have to wait for a train is 1/5, or .20. If you don't have to wait, the commute takes 15 minutes, but if you have to wait, it takes 20 minutes.
a. What is the expected value of the time it takes you to commute?
b. Is the expected value ever equal to the actual commute time? Explain.
James said that he saw a picture of a beautiful girl stashed in Stephen's locker. We can only conclude that Stephen has broken the rules.
Formulate the null and alternative hypotheses. State the level of significance. Find the critical value (or values), and clearly show the rejection and nonrejection regions. Compute the test statistic
Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.
When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 90% confident that the population.
An automated guided vehicle (AGV) can be considered as an automated mobile conveyor designed to transport materials. Most AGVs require some type of guide path. The steering stability of the guidance control system has not been fully solved.
Recent actual and forecasted data for product XYZ is given in the following table.
Some authorities claim that globalization has led to greater income inequality in the U.S. and globally while others claim that inequality is due to improvements in technology and productivity. Using the Library and Internet sources, do the follow..
In the 2000 census of the United States, it was determined that the average household size was 2.59 persons per household.
Create a list of seven, 2-digit numbers (with no duplicates) and another set of seven probabilities (with no duplicates). The probabilities must add to 1.
the mean number of bacteria colonies of a certain type in samples of polluted water is 2 per cubic centimeter cm3.a if
Assuming that the data may be looked upon as a random sample from a normal population, construct a 99% con?dence interval for the actual average number of errors per page in this book and interpret. In this problem, is the normal model appropriate..
Smoking and survival. An observational study was conducted to examine the relationship between smoking and survival. Based on a survey conducted in Newcastle.
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