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For human infants born weighing 5.5 pounds or more, the mean gestation period is 268 days, which is just less than 9 months. The standard deviation is 14 days (McKeown and Gibson, 1951).
What proportion of the gestation periods are expected to last 10 months or longer (300 days)?
If there are 81 fraternity members, how much should they buy so that using the normal approximation they are 93.32% sure they will not run out?
give an unbiased estimator of the following and give the estimated variance assuming
rain is forecast half the time in a certain region during a given time period. we estimate that the weather forecasts
Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
a researcher comuted the f ratio for a four-group experiement. the computed f is 4.86. the degrees of freedom are 3 for
the national freshman-to-sophomore retention rate has held steady at 74. a certain college has 499 of the 585 freshman
What is the shape of the theoretical sampling distribution of the mean for samples of (a) 10 if the parent population is normal? (b) 50 if the parent population is not normal?
How many nickels does a coin counter manufacturer need to weigh so that she can be 98% confident that her sample mean is within 25 milligrams of the true average weight of a nickel?
What is the basic principle that can be used to simplify a polynomial? What is the relevance of the order of operations in simplifying a polynomial?
When considering the symmetric approximation and Monte Carlo risk approaches. Both make the assumption that the total cost distribution is normal.
the weights in kilograms of a group of crates being shipped to panama are 95 103 110 104 105 112 and 92. what is the
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using results, explain the effect of an outlier or extreme ..
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