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Faculty members in a state university system who resign within 10 years of initial employment are entitled to receive the money paid into a retirement system, plus 4% per year. Unfortunately, experience has shown that the state is extremely slow in returning this money. Concerned about such a practice, a local teachers' organization decides to investigate. From a random sample of 50 employees who resigned from the state university system over the past 5 years, the average time between the termination date and reimbursement was 75 days, with a standard deviation of 15 days. Use the data to estimate the mean time to reimbursement, using a 95% confidence interval.
What is the purpose and function of The ?eld of study of statistics?
Five sprinkler systems are installed in a laboratory. In the event of a fire the probability of each one working properly is 0.95. If a fire should occur what is the probability thatall 5 sprinklers will be activated.
Obtain a graphical representation of the relationship and give a brief description of the relationship and estimate the simple regression line and interpret the estimated relationship.
What regression equation would you want to do for banking? Give the y and x variables. Explain why this would be important to know.
the cost of a college education has increased at a much faster rate than costs in general over the past twenty years.
A researcher is comparing two antihypertensive drugs A and B with regards to reduction of patient's systolic blood pressure (SBP). Baseline SBP is measured for two groups of patients.
The one-dimensional monatomic harmonic crystal (section 5.3) is in fact a particular case of the diatom ic model described in section 5.4, for which the two atoms are identical.
if you want to be 95 confident of estimating the population proportion to within a sampling error of plusmn0.05 what
for a particular study at the 5 significance level we were able to reject a null hypothesis that two population
it is claimed that in a bushel of peaches less than ten percent are defective. a sample of 400 peaches is examined and
It is believed that the number of kilometers driven by a tourist in the program is normally distributed with mean 4,500 and standard deviation 1,800. If a country wants to set the mileage limit at a point such that 80% of the tourists in the progr..
In the Program Evaluation and Review Technique (PERT). we are interested in the total time t of a large number of subprojects. For illustration, let X., X2 , X 3 be three independent random times for three subprojects.
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