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At an intersection, each driver who enters can go in one of three directions: L = left, S = straight, or R = right.
a. Write down the sample space for the direction of travel for the next 2 drivers who enter the intersection.
b. Assuming each car is equally likely to go in any of the 3 directions, what is the probability that the first car turns left and the second car turns right?
Suppose that the login times to a computer network follows a Poisson process with an average of 4 logins per minute.
Show that if A and B are closed sets, then A ∪ B is a closed set.- Let B ⊂ A be a closed subset of a compact set A. Show that B is compact.
What is the probability that the survey will show a greater percentage of Republican voters in the second state than in the first state?
She is currently spending all of her income. She is buying 8 units of food. How many units of clothing is she consuming?
A research group wants to estimate the percent of consumers who plan to buy a new cell phone in the next three month.
For each of the following situations, say whether parametric or nonparametric methods would be preferred. Give a reason for your choice.
Does the null hypothesis should be accepted? Use alpha=0.01, and write your conclusion.
What percentage of students will score 229 or better on the verbal subtest of these entrance exams?
-For how many boxes the standard error of the average weight of boxes of envelopes is 0.0083?
Review problems which show how t tests can be used to analyze real-life data. Think about how you might answer each of the questions.
Workers at a large toxic clean up project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult.
Here are the DMS odor thresholds for 10 untrained students:
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