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You are the designer for your company's web site. You have data to indicate that the mean download time for the homepage is 7 seconds and that the standard deviation of download time is 2.0 seconds. If we assume that the download times are normally distributed, what percent of users will wait between 5 and 10 seconds for the homepage to download?
At 0.01 significance level is it sensible to conclude that modification reduced number of traffic accidents?
At.05 level of significance test to find out if number of breakdowns is independent of shift.
Population blood pressure (BP) of patients is normally distributed, with a mean of 127, and standard deviation of 8. A random sample of 49 patients in the hospital found an average BP of 125.
Determine if there is evidence to conclude that the mean number of vacations taken by married individuals is less then the number taken by single/divorced individuals using data in Excel file vacation survey.
Describe the population of interest and calculate the numerical value of the statistic that that the EPA will use to estimate p. Construct a 95% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of ..
Which are likely to be independent events? For those you think are not, suggest reasons why.
Can you think of a policy; political, economic, social, or otherwise, that pushes people toward avoiding one type or another?
Perform a linear regression, 8 month moving average & 3 month moving average forecasting technique to see which is most accurate for the new quarter 11 if quarter 11 sales are 172,000 units
Determine fraction of employees cost between $1,500 and $2,000 per year?
Construct a 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Assuming the manufacturer's claim is true, what is the approximate probability of observing a sample mean of 52 months or less?
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