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1. A school newspaper reporter decides to randomly survey 12 students to see if they will attend Tet (Vietnamese New Year) festivities this year. Based on past years, she knows that 18% of students attend Tet festivities. We are interested in the number of students who will attend the festivities
Find the probability that at most four students will attend.
a. 0.9697
b. 0.9875
c. 0.9213
d. 0.9511
e. 0.9435
2. From January through December 2012, Gallup interviewed more than 170,000 employed Americans 18 years of age or order. The graph shown is compiled from data collected by Gallup. The Emotional Health Index Scores are the sample space. We randomly sample one Emotional Health Index Score.
What is the probability that the selected Emotional Health Index Score is less than 80.2 given that it is already less than 81.
a. 0.4385
b. 0.4156a
c. 0.4286
d. 0.4137
e. 0.4596
A space probe near Neptune communicates with Earth using bit strings. Suppose that in its transmissions it sends a 1 one-third of the time and a 0 two-thirds.
ind a value h such that 99% of all dining-room chairs have height less than h - Find the first and third quartiles of the dining-room chair height distribution
Since she is allowed to reserve one time if her first serve is out what should her serving strategy be?
Find an estimate of an observed setting time for an ambient temperature of 65°F.- How much less time does a joint take to set if the temperature rises by 10°F?
How accurate are radon detectors of a type sold to homeowners? To answer this question, university researchers placed 12 detectors in a chamber that exposed them to 105 picocuries per liter (pCi/l) of radon. Graph the data, and comment on skewness..
Suppose also that the length of life of each component, measured in hours, has an exponential distribution with mean.
1. Suppose that 4 items are selected at random from manufacturing process. Each item is inspected and classified defective (D) or non-defective (N).
Suppose that Fara is preferred by every man to all the other women.- Prove that under every stable matching Fara is matched to the same man. Who is the lucky guy?
What are some of the challenges associated with Disney theme parks? Use examples.
a) Are internships and improved grades independent events? Prove. b) What is the probability that a student's grades will improve?
Construct a 90% confidence interval for the population proportion of adult drivers that admit they talk on cell phones while driving.
What is the significance of the critical path when defining a project? Is the critical path the shortest path.
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