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Question: In a Phone Central, we observe, every minute, if certain phone line is or is not occupied. In this way, it has been told that the probability of certain line is occupied in certain moment, if in the last minute was free, is 30% and the probability of certain line is free if in the last minute was occupied is 25%.
a) Identify the space of results of an observation of 2 consecutive minutes.
b) Identify the probability of certain line be free if in the last minute was free.
c) If certain line is occupied in a certain moment, what is the probability of that line be free in the next minute? Explain.
Suppose that, in a sample of 200, we observe 140 successes. Is this sufficient evidence at the 1% significance level to indicate the the population proportion of successes is greater than 65%
a family has two children. what is the conditional probability that both are boys given that at least one of them is a
You took the standard deviation of 4.5 minutes from a commuting friend and believe that that is the standard deviation for the area. Prepare a 95% confidence interval for the true average commuting time.
question the mean of a normal probability distribution is 60 the standard deviation is 5.a what percent of the
Participants is approximately a normal distribution with a mean of 68 years and a standard deviation for 3.5 years. What proportion of the plan recipents die before they reach the standard retirement age of 65.
If the selected coin is flipped twice and comes up heads twice in a row, what is the probability that the coin is two-headed?
Conclude the finite population, correction factor.With the population size of 1,000 and a planned sample size of 200, what is the finite population, correction.
Choose one of these tests and describe in your own words, the purpose of the test, any particular assumptions or limitations pertaining to the test, and provide an example where you could employ the test.
If the company does not want to replace more than 5% of the televisions?
In teaching the role of statistical application in Health Science, the importance of reliable and valid data is very critical in research process.
Calculate a 92% confidence interval for the mean density of quartz porphyry, given that 75 samples yield mean of 2.62 grams per cubic centimeter
testing for population mean.bookstores like education one reason being that educated people are more likely to spend
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