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The Math Team in Columbus traveled to Athens for a math competition. The bus averaged 40 mph on the drive from Columbus to Athens but averaged 60 mph during the return trip. What was the average speed of the bus for the entire trip?
The mean television viewing time for teens is 3 hours per day. Assume the population mean is 3 and the population standard deviation is known to be 1.2 hours.
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
The standard deviation for the costs of all doctors visits is $35.15, estimate with 95% confidence the average cost of a doctors visit for all the patients of this medical clinic.
If 8 patients participate in this study (so that n left arms and n left arms are measured), how many degrees of freedom should the researcher use in her t-test critical value?
A sample of 500 respondents was selected in a large metropolitan area to determine various information concerning consumer behavior, Among the questions asked was "Do you enjoy shopping for clothing?
Thirty homes responded, and the sample mean water use per day was 77 gallons with a standard deviation of 9.0 gallons per day.
The intensity level of an earthquake is based on the Richter scale. Using logarithms, the Richter scale measures an earthquake relative to (as a ratio of) the weakest possible tremor.
What is the mean of this uniform distribution? What is the standard deviation?
What is the probability that the person will be hospitalized for a drug-related problem, given that the person has received the PMI sheet?
At times we can generate a regression equation to explain outcomes. For example, an employee's salary can often be explained by their pay grade, appraisal rating, education level, etc.
Is there a relationship between sales and newspaper advertising? Support your answer?
Customers arrive to purchase tickets each hour. Determine the average time a ticket buyer must wait and the portion of time the ticket seller is busy.
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