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A kindergarten class has three left-handed children and seven right-handed children. Two children are selected without replacement for a shoe-tying lesson. Let X 5 the number who are left-handed.
a. Write the simple events in the sample space. For instance, one simple event is RL, indicating that the first child is right-handed and the second one is left-handed.
b. Find the probability for each of the simple events in the sample space. (Hint: A tree diagram may help you solve this.)
c. Find the probability distribution function for X.
d. Draw a picture of the probability distribution function for X.
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Prepare a power curve for this decision rule
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(a) Describe the sample space ?. (b) What is the probability that three tosses will be required?
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A sample of 50 provided a sample mean of 14.15. The population standard deviation is 3.
For the passengers in the SRS, what is the approximate probability that the mean length of time for them to get through security will be less than 18 minutes?
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