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First people's Bank of Central City would like to improve their loan application process. In particular, currently the amount of time required to process loan applications is approximately normally distributed with a mean of 18 days. Measures intended to simplify and speed the process have been identified and implemented. Were they effective? Test the appropriate hypothesis at the 1% significance level if a sample of 25 applications submitted after the measures were implemented gave an average processing time of 15.2 days and a standard deviation of 2 days. Use both the p-value and the critical value approach.
a researcher wants to determine if the average performance on a standardized business management test is significantly
Let Monday's requirements change from 17 to 25 in increments of 1. Use Solver Table to see how the total number of employees changes.
Calculate trial control limits for the two charts and on the assumption that the R chart is in control, estimate the process standard deviation.
final exams at uo are generally considered either easy 20 or hard 80. at the same time the grades are usually perceived
Is this a normal distribution? What is the outlier? Are there any outliers in this distribution?
Explain why comparing children whose parents chose a Montessori school with children of other parents would not show whether Montessori schools perform better than other programs?
What is the null hypothesis in a chi-squared test of independence? List the assumptions under which the linear regression model is supposed to work.
Research department tells you that a annual sales for a typical coffee shop located in the West Loop are normally distributed with mean (µ) $100,000
approximate the expectation and the variance of a random variable using simulations. we are able to approximate the
The authors of a study looking at the effect of alcohol intake on colorectal cancer reported an incidence rate ratio of 2.1 (95% CI: 2.05-2.31)
The Johnson family uses a propane tank for cooking on their gas grill. During the summer they need to replace their tank on average every 30 days.
Assuming that self-esteem is the predictor variable and grades are the outcome variable, provide an example of a research question that may be tested
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