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Assume that you calculated a 95% confidence interval for the mean newborn length of babies born in the United States to be 17 to 20 inches. Explain in words what this confidence interval means. Note: be careful because it does not mean that there is a 95% probability that the true mean length lies between 17 and 20 inches.
a taiwanese fast food chain wants to introduce its franchises into the western united states 28 different states .
What is the probability that a carpet that is 8 metres by 10 metres contains no flaws? Use an appropriate Excel function and write down the formula shown in the formula bar.
A researcher expects the population proportion of the Cubs Fans in Chicago to be 80%. Error of less than 5% confident of an estimate to be made from a mail survey. What is the sample size required?
Find the 93% confidence interval of the true mean. If a day care center were starting up and wanted to keep tuition low, what would be a reasonable amount to charge?
in a second grade class containing 12 girls and 10 boys 2 students are selected at random to give out the math papers.
compare the means of the following sets of yield data from catalysts aampb. determine if we can state the mean yield of
three different assembly methods have been proposed for a new product. a completely randomized three different assembly
the z-score for a particular number x is -1.25 where the values have a mean of 175.0 and a standard deviation of 12.0.
Does it appear that the treatment is effective? That is, is it very likely that we would observe only 6/200 contract hepatitis when 7% of the population is known to do so?
question a corporation owns several companies. the strategic planner for the corporation believes dollars spent on
Based on past information, for the cars used, the distance traveled by a car in a day averages 170 km with a standard deviation of 40 km. What proportion of cars used in any day travel less than 100 km?
The weight of a product is normally distributed with a standard deviation of .5 ounces. What should the average weight be if the production manager wants no more than 5 percent of the products to weight more than 5.10 ounces.
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