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Analyze data mining and explain the importance of data mining, and examine its implementation in four real-world scenarios.
How would you allocate a sample of 900 observations if you want to estimate the mean electricity consumption for all households in the city?
what are the steps in the construction
Find a 95% confidence interval for the odds ratio measuring the strength of the relationship between the disease and the exposure. Test for the independence between the disease and the exposure.
national figures reveal that the probability that a youthful offender on probation will commit another crime is 0.80. a
We took a random sample of 25 customers and found a mean waiting time of 22 minutes with a standard deviation of 6 minutes. We want to construct a 99% confidence interval for the population mean of such waiting times.
indicate whether the data are a time series or a cross section.number of cars sold in a dealership each day in
Determine the coefficient of determination for this regression problem and comment on its capability to predict outcome.
Do students at various colleges differ in how sociable they are? Twenty-five students were randomly selected from each of three colleges in a particular region and were asked to report on the amount of time they spent socializing each day with other ..
Do the data indicate a significant difference between the frequency distributions for male and females? Test at the .05 level of significance and describe the difference.
find confidence interval for the difference between the mean original price per item and the similar mean for customers who purchase something.
Run a simple linear regression of these five pairs of numbers and estimate a linear relationship between income and percentage growth in wealth.
An accountant wants to estimate the average amount of an account of a ser- vice company. A random sample of 46 accounts yields x = $16.50 and s = $2.20. Give a 95% con?dence interval for the average amount of an account.
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