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A desktop PC uses an average of 120 watts of electricity per hour based on 4 hours use per day. Assume the variable is approximately normal and the standard deviation is 6 watts. If 500 PCs are selected at random, approximately how many will use more than 130 watts?
Assume the random variable X is normally distributed with mean μ = 50 and standard deviation σ = 7. Compute the probability. Be sure to draw a normal curve with the area curve with the area corresponding to the probability shaded.
What is the characteristic function of N? What is the mean and variance of N? What is the pmf of N? What is the probability that N is an even number?
Fit a linear curve to these data. Also determine SSR - The data relate x, the moisture of a wet mix of a certain product, to Y, the density of the finished product.
What is the mean number of leaking tanks in such samples of 15? What is the probability that 10 or more of the tanks leak?
in an october 2012 survey of 7786 randomly selected adults living in germany 5840 said they exercised for at least 30
An operator is looking to put a kids' adventure playground in the centre of the island and these typically cater for people living up to 5km
Of those not having lung disease, 25.3% are smokers. Determine the probability that a randomly selected smoker has lung disease.
Because of tough economic times, the Indiana legislature is debating a bill that could have significant negative implications for public school funding. There are three possibilities for this bill: (1) it could be passed in essentially its current..
The poll actually asked several questions. If we wanted to report an error of estimation that would be valid for all of the questions on the poll, what value should we use?
The wheat harvesting season in the U.S. Midwest is short, and most farmers deliver their truckloads of wheat to a giant central storage bin within a twoweek.
If a freshman takes one course in each area during her first semester, how many course selections are possible?
Developing marketing strategies for travel to Hawaii. In 1997 approximately one-third of all tourists to Hawaii were from Japan.
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