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It has been established that length of gestation until birth for pregnant women is random variable which is well modeled by Normal distribution with mean μ = 282 days and standard deviation σ = 11 days.
Births with gestation time of 258 days or less are regarded to be premature births. Determine the probability that randomly selected pregnant woman will give birth to premature baby?
Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
What assumption about the population distribution is needed in order to conduct the t test in (a)?
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
Concept of statistical signi cance
Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men. What is the probability that exactly one woman is selected?
The annual precipitation amounts in certain mountain range are normally distributed with a mean of 88 inches, and a standard deviation of 10 inches.
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a test of sample means or sample proporti..
Note down a research that requires a decision making with probabilities.
If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain how your answer could change if you knew returns followed a skewed distribution instead of a normal d..
Describe appropriate treatment means μ1, μ2 and μ3. After that Test for statistically significant differences between these treatment means. Set α = 0.05.
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
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