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A gambler has a fair coin (with one head and one tail) and a two-headed coin. He selects one of the coins at random, and when he flips it, it shows heads. Suppose that he flips the same coin a second time and again it shows heads. Then he flips the coin 2 more times. What is the expected number of heads across all 4 flips and the variance of the number of heads across all 4 flips?
a real estate agent has appointments with eight prospective clients. from past experience the agent knows that the
suppose the amount of time it takes a popcorn kernel to pop is normally distributed with a mean of 150 seconds and a
Compute the probability of a successful operation (i.e., an operation in which at least one hit is a success) if all 3 missiles are launched and a hit within 40 miles of the target is considered a success.
Delivery time over twenty delivery days was 8.6 hours. At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
A survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
chebyshevs inequality for regular worker the preparation time for daily work needs 35 minutesday and with standard
to compare the effects on energy intake of drinking wine either before or with a meal 11 men participated in a
If a baseball player's batting average is 0.340 or 34%, find the probability that the player will have a bad season and only score at most 60 hits in 200 times at bat?
1. according to the yankee group 53 of all cable households rate cable companies as good or excellent in quality
Suppose that Richard Rice, a resident of the area, decides to take the test for malaria. If his test results indicate that he has malaria, what is the probability that he actually has malaria?
a pump is designed to move water and deliver to a vertical distance of 80m what energy per kg of water must be supplied
The grades on the exam have a mean score of 80 with a standard deviation of 6. Describe as completely as possible the distribution of grades.
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