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Suppose strep resistance rates in all cities across the country are actually 0.05.
a) If samples are taken in a particular city to produce a 90% confidence interval for the proportion of all strep cultures in the city that are resistant to antibiotics, what is the probability that the 90% confidence interval succeeds in capturing the true population proportion for that city?
b) If samples are taken in 100 cities across the country, to produce 100 90% confidence intervals for the proportion of all strep cultures in each city that are resistant to antibiotics, about how many of the intervals should succeed in capturing the city's true population proportion?
c) About how many of the 100 90% confidence intervals would fail to capture the true population proportion?
What are the critical values for z on a one-tailed test if alpha = .01? .001? What would the critical values be at both levels of significance if it was a two-tailed test?
According to the study, the mean age of a self-employed individual is 46.6 years with a standard deviation of 10.8 years.
In the case of Castenedav. Partida, it was found that during a period of 11 years in Hilda County, Texas, 870 people were selected for grand jury duty, and 39% of them were Americans of Mexican ancestry.
q1. both undergraduates and postgraduates can use the university cafeteria. each diner can choose between buying a
Pick a random sample of 50 homes from the enclosed 90 cases. Double the asking price and selling price and use this data to develop three predictive models:
Bell-shaped with a mean of $45, 000 and a standard deviation of $3, 500. What percentage of teachers earn anywhere from $38, 000 to $48, 500?
question a sample of legal costs in thousands of dollars for school districts for two recent consecutive years is
Identify a business situation where you might want to make an estimate. For example, you might want to estimate the mean dollar amount spent by customers at a retail store.
if the mean value of a set of data including 6 sample tests is 20 and the standard deviation of the data is 5 what is
Use the following graph of a function f to determine x or y to the nearest integer as indicated. Some problems may have more than one answer.
You are asked to estimate the chance that the sum will be positive. Can you do it if you are also told the average and SD of the numbers in the box, but are not told the numbers themselves?
Use SPSS and generate all necessary summary statistics and figures (e.g. boxplots, histograms and/or scatter plots) to describe the relationship between the workers' mental health
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