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A bath soap manufacturing process is designed to produce a mean of 120 bars of soap per batch. Quantities over or under are undesirable. A sample of 10 batches shows the following number of bars of soap. The population is assumed to be normal.
108, 118, 120, 122, 119, 113, 124, 122, 120, 123
Using a .05 level of significance, test whether the sample results indicate that the manufacturing process is functioning properly.
What is the probability of finding 1 or more children with chronic bronchitis in a population where the incidence rate of chronic bronchitis is 10% (like the one above?)
In a poll to estimate presidential popularity, each person in a random sample of 1000 voters was asked to agree with one of the following statements:
Maria Gomez, a research analyst in the state department of health, has undertaken a study of the possible consequences of overbuilding hospital facilities.
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States
What is the major difference between finding significance and confidence intervals using population samples or using population proportions?
A random sample results in 1 = 20 with n1 = 100. The population standard deviation is σ1 = 6. Another sample was selected independently resulting in 2 = 22 with n2 = 100. The population standard deviation is σ2 = 7. Test that the population means ..
A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report.
What is the probability of this actually happening?
What is the best estimate of the average tread life in miles for the entire population of these tires?
As sample size increases, the standard error of M _______________ .
If a woman purchases Super Cola, what is the probability that it is a diet soda?
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