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The following regression model has been proposed to predict sales at a computer store. Y hat = 50-3(x1)+20(x2)+10(x3) where x1 = competitors previous day's sales (in $1,000s) and x2 = population within 1 mile (in 1,000s). Predict sales (in dollars) for a store with the competitor's previous day's sale of $5,000, a population of 20,000 within 1 mile, and nine radio advertisements
Suppose a wildlife service wishes to estimate, with 99% confidence, the mean number of days of hunting per hunter for all licensed hunters in the state during a given season, with a bound on the error of estimation equal to 2 hunting days.
Run a Monte Carlo simulation 1000 trials for the following distribution. Determine the mean and standard deviation of the simulated distribution.
Using Chi-square table finding the P-value and interpret the result
customers arrive at a local atm at an average rate of 20 perhours. assume the time arrivals follow the exponential
What is the probability that the difference between the sample mean and the population mean is less than 0.01? 5. What is the likelihood the sample mean is greater than $ 3.87?
The following data were obtained from an independent measures study. Determine if there is a significant difference between the treatments. Use a significant level of .01.
a study of 45 professors showed that the average time they spent creating test questions was 13.0 minutes per question.
a survey of 175 gun owners was taken and 44.3 of them said they have a gun for protection for self andor family. is
What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
Pretests, posttests and threats to internal validity and please discuss all threats to internal validity.
suppose the participants for jury duty are picked from a large pool of county residents with equal numbers of men and
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