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A survey was conducted to measure the number of hours per week adults in the United States spend on their computers. In the survey, the number of hours were normally distributed, with a mean of 7 hours and a standard deviation of 1 hour. A survey participant is randomly selected.
(a) Find the probability that the number of hours spent on the computer by the participant is less than 5 hours per week.
A university's administrator proposes to do an analysis of the proportion of graduates who have not fuond employment in their major field one year after graduation
the number of taxicabs waiting outside a popular downtown bar can be modeled as a poisson random variable. the
Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit and determine the p-value. Show all work; writing the correct critical value, without supporting work, will receive no c..
A University employment office wants to compare the time taken by graduates with 3 different majors to find their first jobs after graduation.
the proportion of americans who are satisfied with the way things are going in there lives is 0.76. suppose that a
The dollar amount of damage involved in an automobile accident is an exponential random variable with mean 1000. Of this, the insurance company only pays that amount exceeding (the deductible amount of) 400.
The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed,
a manufacturer claims that the batteries it makes will last 18 hours with a standard deviation of 1.5 hours. if the
Researchers wanted to determine if there is a difference in the mean credit card debt owed by males versus females. Using α = 0.10, is there a difference. (Show all six steps of hypothesis testing.)
Find the mean and the standard deviation of the sampling distribution of x, and find an interval containing 95.44 percent of all possible sample mean returns.
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a t..
Suppose you have a random variable that is uniformly distributed between 3 and 27. What is the expected value for this random variable? Answer to one decimal place if necessary.
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