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A bottled water plant utilizes a production process designed to fill bottles with 20 ounces of water. The population of filling volumes is normally distributed with a standard deviation of 1.3 ounces. Periodically, process engineers take 20-bottle samples and compute the sample mean. a. What are the upper and lower control limits? b. Suppose the last five sample means were 19.4, 20.2, 20.5, 20.7, and 21.1 ounces. Is the process under control?
in a certain population 60 of people have blond hair.a what is the probability that in a group of 10 people from this
To what probabilities do each of the following sigma levels correspond to, based on a standard normal curve: 3 sigma, 4sigma, 5 sigma, and 6 sigma? (Hint: Use the NORMSDIST function in Excel.
question the mcdougal sandwich shop has two windows available for serving customers who arrive at a poisson rate of
Do the data in the sample represented in the Excel file support his contention at the .05 level of significance?
What is the chance that stock will fall by more than 15% next month? What extra assumption are you making when replying this question?
a particular telephone number is used to receive both voice calls and fax messages. suppose that 25 of the incoming
A case-control study is performed to study the relationship between esophageal cancer and an exposure (exposure A).
You have asked to research the high absenteeism rate in your company. One required analysis is to be by gender. Assume you have been asked to do the study via a survey.
What is given is the mean=27.2 kilograms and standard deviation=4.3 kilograms. I attempted to work out a which I know is wrong but this is what I did.
Recognize sample, population, sample statistic, and population parameter: Nasonex is the drug used to treat allergy symptoms.
Determine the proportion of variation in grade that can be explained by the linear correlation between the grade and the number of credit hours earned at the same time of taking the course.
Estimate the probability that the next time you ride in a car, you will not be delayed because of some car crash blocking the road.
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