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It is estimated that .52 percent of the callers to the Customer Service department of Dell Inc. will receive a busy signal.
What is the probability that of today's 1,300 callers at least 5 received a busy signal? Use the poisson approximation to the binomial. (Round your answer to 4 decimal places.)
The following data is sampled from an exponential population with unknown parameter β.
Show that a suitable power of a Weibull-distributed random variable whose parameter is gamma-distributed is Pareto-distributed. More pre- cisely, show that if X | A = a ∈ W ( 1 , 1 ) with A ∈ Γ(p, θ), a b then Xb has a (translated) Pareto d..
a seven-year medical research study reported that women whose mothers took the drug diethylstilbestrol des during
A bottling company uses a filling machine to fill plastic bottles with cola. The bottles are supposed to contain 300 milliliters (ml). In fact, the contents vary according to a normal distribution with a mean of 298 ml and a standard deviation of 3 m..
What is the forecast for year 13 based on the 5-year moving average? What is the forecast for year 13 based on the 5-year weighted moving average? What is the MAD for the moving average forecast
students enrolled in an introductory statistics course at a university were asked to take a survey that indicated
What are the limitations and assumptionbs of the t-test? What are some examples in your field (Nursing) for which you might use a t-test to compare a sample to the population and why?
a study was done on the propagation of an ultrasonic stress wave through a substance. in particular attenuation in
A researcher measures a response variable Y and explanatory variable X on each of several objects. A scatterplot of the measurements is as follows.
oh has 15 residents 10 are democrats. in a sample of 4 different voters what is the probability that exactly 3 are
two companies market new batteries targeted at owners of personal music players. duratunes claims a mean battery life
Home mortgage interest rates for 30-year fixed rate loans vary throughout the country. During the summer 2000, data available from various parts of the country suggested that the standard deviation of the interest rates
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