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1. If 15% of adults in a certain country work from home, what is the probability that fewer than 42 out of a random sample of 350 adults will work from home? (Round your answer to 3 decimal places)
2. Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If we want to estimate this proportion to within 4% at the 95% confidence level, how many randomly selected teenagers must we survey?
A shirt manufacturer determines by observation that the circumference of the neck of a college man is a random phenomenon approximately
Let X denote the waiting time until the tenth call arrives. What is the pdf of X? What are the moment generating function, mean , and variance of X?
Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
Your firm is contemplating the purchase of a new $800,000 computer-based production system. The system will be depreciated straight-line to zero
Let N be the number of customers in an M/G/2/2 (loss) system after a time long enough for the system to be in stationary regime.
Convinving evidence at the .05 significance level to support the claim that the actual number of cards is an undergrads wallet is greater than 4.09. state the null and alternative hypothesis.
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportions of children are overweight?
the manager of a video library would like the variance of the waiting times of the customers not to exceed 2.30
a new bus route has been established between downtown chicago and springfield. dan has taken the bus to work for many
1. identify a commonly used graphical technique for portraying events and relationships among events.2. what does it
When studying the simultaneous responses to two categorical questions, we should set up a:
If you did guess at each of 15 true-false questions, what is the expected value of X = number of correct answers? Is the expected value a possible score on the quiz? What exactly does the expected value tell us?
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