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The average elecric cost of mid-size manufacturing companies operating in the western United States is $0.10/KWhr, with a standard deviation of $0.03/KwHr. A sample of 35 companies are surveyed. What is the likelihood that the sample mean is less than $0.09?
When the machine is properly calibrated, what is the probability that the mean for a simple random sample of this size will be at least 26.2 seconds?
How much can students expect to make on graduation? Explain. What variables (if any) affect how much a student can expect to make? Why/why not?
among a random sample of 150 employees of a particular company the mean commute distance is 25.5 miles. this mean lies
give the equation for the standard deviation of a random variable x over an entire population with probability mass
The results are D‾= 0.2 kilowatt and SD = 1.0 kilowatt. At α = 0.01, is there evidence to conclude that conservation efforts reduce consumption?
Siblings The histogram shows the distribution of the numbers of siblings (brothers and sisters) for 2000 adults surveyed in the 2012 General Social Survey.
Wondering if there is evidence that drivers of SUVs are safer, we hope to create a 95% confidence interval for the difference in driver death rates.
a suppose that a newspaper in wisconsin wants to take a statewide survey concerning state budgetary issues. the
Find the percentile score for mean of the students from the student section. Note: (µ = 65) and (s = 12).
in how many ways can a student answer an 8-question true-false examination if he marks half the questions true and half
Suppose a random sample of 16 is selected from a population with a normal distribution with a known population standard deviation s of 10.
The following data represents the running time (in minutes) of the movies who won the Academy Award for Best Picture for the years of 2006 - 2009.
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