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A random sample of 42 locations were selected. For each location, the 2013 per capita spending on a specific item was determined and an index of "level of urban development" was created. Each location assigned a value (where 0 indicated a completely rural & 100 a completely urban area). A simple linear regression relating expenditure to this index was performed. The estimated intercept and slope were a = 1.96 and b = ?0.0211, the sample correlation coefficient between the two variables was r = ?0.888 and the MSE from the regression was 0.1603.
What is the predicted per capita expenditure for locations with an urban development index value of 50?
the worker at a carnival game claims that he can communicate with a small magic rock and to prove it he tells you to
Based on a random sample of 2,500 people, the estimates of people by age group unemployed in one Northern city are found in the table. Is the study descriptive or inferential?
Compare two models. Model #1 has an r-squared of .25 and an adjusted r-squared of .10. Model #2 has an r-squared of .20 and an adjusted r-squared of .14. Given this information, what model should you use?
Election-day polls are taken from voting precincts selected because they are believed to be representative of all voters.
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
question dr. patton is a professor of english. recently she counted the number of misspelled words in a group of
Calculate a confidence level at 95% to get an interval estimate for proportion?
a certain adjustment to a machine will change the length of the parts it makes but will not affect the standard
do you drink the recommended amount of water each day? most americans dont on average americans drink 5.5 eight-oz
birth weights in the us are normally distributed with a mean of 3420g and standard deviation 495g. what is the
With probabilities 0.8, 0.1, 0.08 and 0.02 respectively. A particular company offers a $500 deductible policy. If the company wishes its expected profit to be $100, what premium should it charge?
1.a large study was done to compare two treatments for recurring ear infections in young children. a total of 150
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