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If you were to use confidence intervals to help make a decision in life situation. Include a description of the decision, how the interval would impact the decision, and how data could ideally be collected to determine the interval.

Alumni Giving Joseph Randal has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage […]

In a history class, students take a weekly multiple choice quiz consisting of 6 questions, each with 4 possible answers. If a student randomly guesses at the answer to each question for every quiz, then what is the mean number of correct answers the student will get on each quiz?  Round your answer to one decimal place as necessary. For example, 4.5 would be a legitimate entry.

The medical director and chief nursing officer at your hospital have agreed to institute a new safety protocol for diabetes who take oral hypoglycemics and levofloxacin based on a study that reports statistically significant increased risk for hyperglycemia in this patient population. You know this means: 1) the p-value was greater than alpha in the study 2) a type I error is going to be made 3) the safety protocol is an example of a hypothesis test 4) the hospital leadership has concluded that the study result are clinically significant

call center, calls come in at an average rate of one call every two minutes. Assume that the time that elapses from one call to the next has the exponential distribution. please Find the value that separates the top 10%.