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The county government in a city that is dominated by a large state university is concerned that a small subset of its population have been over utilized in the selection of residents to serve on county court juries. The county decides to determine the mean number of times that an adult resident of the county has been selected for jury duty during the past 5 years. They will then compare the mean jury participation for full-time students to nonstudents.
a. Identify the populations of interest to the county officials.
b. How might you select a sample of voters to gather this information?
He randomly samples 45 oil wells throughout the United States and determines the mean output to be 10.7 barrels per day with a standard deviation of 1.3 barrels. Test the researcher's claim at the .025 level of significance.
Data from a National Health Survey show that men's average weight is normally distributed with a mean of 172 pounds and a standard deviation of 29 pounds.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Find the prices of 10 different printers for your PC. Compute the mean, median and mode of these prices
Construct a scatterplot, find the value of the linear correlation coefficient r, and find the P- value using a= 0.05. Is there sufficient evidence to conclude that there is a linear correlation between systolic measurement and diastolic measuremen..
The number of T.V. homes in the sample having cable T.V. What is the probability that at least 2 T.V. homes in the sample are served by cable?
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
fitting of multiple linear regression equation.the revenues gained from sales of books from an e-book supplier the book
Then describe trade-offs which will happen when you lower sample to $10,000 to meet their budget.
a sample was drawn of one-acre plots of land planted with corn. the crop yields were recorded. calculate the
What is the probability of no mutant ability rounding to 3 decimal places - what is the probability of being bitten by a flea rounding to 3 decimal places?
Please note the following definitions: The prevalence of a disease is the proportion of individuals in a population or subpopulation who have a disease.
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