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1. A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car. If it shows an even number she takes the freeway; if it shows an odd number, she takes the in-town route. She records the total time each day. At the end of the study, if she detects a significant difference in time, can she conclude it is due to the route?A. Definitely not. There are lurking variables such as traffic, road construction, etc.B. Maybe. There are lurking variables.C. Yes
2. A drug manufacturer is studying how a new drug behaves in patients. Investigators compare 2 doses, 5 milligrams (mg) and 10 mg. The drug can be administered by injection, skin patch, or intravenous drip. Concentration in the blood after 30 minutes is then measured. The factor(s) in this study areA. Drug dose.B. Drug dose and how it's administered.C. 5 mg by injection, patch or drip and 10 mg by injection, patch, or drip.
3. Sampling variability refers toA. the idea that different samples will include different individuals.B. the idea that different samples will give different statistics.C. the idea that every sample shows variability.
Drug Store News (September2002) provided data on annual pharmacy sales for the leading pharmacy retailers in the United States. Show a stem-and-leaf display.
Ford Taurus travels 21 mi. while consuming exactly 1 gallon of gas. You developed a modification to the engine you believe increases the distance. If you want to justify your claim of increased mileage by using a hypothesis test
Design an imaginary study or discuss an actual study you've read about that has an experimental or quasi-experimental design that used or would use t-tests or ANOVAs in the data analysis.
Duplicate readings, using two separate instruments, were obtained on ten samples. What is the tabular value of the statistic used to determine the significance of the mean difference at the .05 level of probability?
The producers of a new toothpaste claim that it prevents more cavities than other brands of toothepaste. A random of 60 people used the new toothpaste for 6 months.
Calculate the correlation coefficient. What is the coefficient of determination from these sample statistics? What does this coefficient indicate?
Below is a normal plot of residuals from a regression. Does the plot indicate any problems with the assumption that the residuals are Normally distributed
Use the Emperical Rule to find what two values 68% of the data will fall between for a data set with a mean of 219 and standard deviation of 20.
To test whether the significant difference between two proportion test using large sample test.
Developing the histogram and pie chart for the sample data.
The national basketball association calculates many statistics, as do other professional sports organizations.
Please prepare a Regression and Automated Testing Plan for a Course Project. A business letter to the Jonesville Library introducing the contents of the document
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