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A sample of 400 bags of dog food which are advertised to contain twenty-five pounds had a mean content weight of 24.5 pounds with a standard deviation of 3 pounds. Find a 95% confidence interval for the population mean content weight of the bags of dog food.
Prepare a frequency distribution from data given below that describes how long it took a person to drive to work in work week.
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
The mean amount of a purchase at the Smith Hardware store is $23.50 with standard deviation of $5.00. The amounts purchased follow normal distribution.
Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get the sample proportion of .35 or more.
Supposing that the entire $10,000 can be spent on tires (ignoring other costs), and that the true fraction that will fail is approximately .05, can NHTSA attain its goal while staying within the budget? Describe.
The membership for the club this year isobserved to be 14 freshman, 19 sophomores, 51 Juniors and 16Seniors. At 95% level of confidence, test the advisors belief..
The manager of the Gander Mountain store in Frogtown, IL, believes that his prices for ammunition are lower than the prices of his primary competitor in the hunting equipment market, Cabela's.
At the .025 significance level, can we conclude that less than 88 percent of the orders are delivered in less than 10 minutes?
Which of the following is a major difference between the binomial and the hypergeometric distributions?
Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error.
Suppose that in a population of 10 items, 3 are defective and 7 are not. Suppose that two items are chosen at random for inspection. Let X be the number of defective items inspected. report all probabilities to a minimum of 5 decimal places of acc..
Currently, quarters have weights that are normally distributed with a mean of 5.670 g and a standard deviation of 0.062 g. A vending machine is configured to accept only those quarters with weights between 5.550 g and 5.790 g.
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