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Weekly demand at a grocery store for a brand of breakfast cereal is normally distributed with mean of 800 boxes and a standard deviation of 75 boxes. What is the probability that demand is 959 boxes or less?
Determine and plot the probability mass function and probability distribution function of the contract award amount (in millions of dollars).
Population is know (from a previous large survey) to be $3000 with the standard deviation of $400. Find the 99% confidence interval for the sample mean.
A random sample of 25 days' receipts is chosen for an audit. What is the probability that the sample mean is larger than $2,220?
Is there solid evidence that the earth is getting warming? 69% of 731 male resondents answered yes and 70% of 770 female respondents answered yes.
Historically, 70% of your customers at Rodale Emporium pay for their purchases using credit cars. In a sample of 20 customers, find the probability that
Work through a simple regression calculation using intrinsic job satisfaction nd extrinsic job satisfaction. Select thirty data points to use for each group.
A random variable X that has pmf given by p(x) = 1/ (n+1) over the range Rx = {0,1,2,...,n} is said to have a discrete uniform distribution. Find the mean and variance of this distribution.
A student is taking a multiple choice exam in which each question has four choices . Assume that the student has knowledge of a correct answer to any of the questions.
A sample of 15 workers revealed the following number of minutes traveled. Develop a 98 percent confidence interval for the population mean. Interpret the result. Please explain how you calculate.
A production process manufactures items with weights that are normally distributed with mean 16 pounds and standard deviation 0.15 pound. An item is considered to be defective if its weight is less than 15.8 pounds or greater than 16.2 pounds.
Assume that your students are a sample of all fourth graders in your state and you can use your student data to test some ideas. What is the major problem with your assumption.
Cite an example of how you could/would apply a test of a hypothesis for a single population proportion, two tail test described in the lecture to real world situations?
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