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Question: Retention rates. In 2004 the testing company ACT, Inc., reported on the percentage of first-year students at 4-year colleges who return for a second year. Their sample of 1139 students in private colleges showed a 74.9% retention rate, while the rate was 71.9% for the sample of 505 students at public colleges. Does this provide evidence that there's a difference in retention rates of firstyear students at public and private colleges?
A restaurant has an ice cream counter where it sells two main products, ice cream and frozen yogurt. The restaurant makes one order for ice cream and yogurt each week, and the store has enough space for 115 gallons of both products.
In a distribution of fingernail length where n= 196, s = 7 & x bar = .75, compute a 92% Interval Estimate.
A numerical error in preparing his or her income tax return. If 10000 forms are selected at random and examined. Find the probability that 6,7,8, of the forms contain an error.
A student wanted to find out the effects of alcohol on reaction time, so he found the reaction time of each subject under both conditions-alcohol and no alcohol.
Use Markov's inequality to find an upper bound on the probability of having more than 200 cars arrive in an hour.
Mercedes Goes After Younger Buyers
What influences the probability of a Type II error? - What is the difference between statistical significance and practical significance?
please illustrate positive correlation negative correlation and zero correlation with scatter
the life expectancy of a common brand of battery is normally distributed with a mean of 400 hours and a standard
Calculate the expected number of days it takes to get the order and standard deviation.
A random sample of 60 days shows that the mean daily number of gallons sold is 10.00. What is the point estimate of the population mean?
270 randomly selected light bulbs were tested in a laboratory 98 lasted more than 500 hours. find a point estimate of
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