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A researcher is interested in whether the color of an animal's surroundings affacts learning rate. She tests 16 rats in a box with colorful wallpaper. Assume it is known that the average rat can learn to run this particular maze (in a box without any special coloring) in 25 trials, with a variance of 64; the distribution is normal. The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
Assume sps professors have the average life normally distributed of 82 years, with population standard deviation of 5 years. Determine percent of sps professors will not live more than 80 years?
Choose one of the options below that explains what information is provided in the interval that is not in the significance test results:
Use the fact that the confidence interval for the mean is in the for x- E to x+ E to compute the sample mean and the mazimal margin of error E.
Find the equation of least -squares line and plot the line on the scatter diagram of part (a)
The standard deviation of all possible x values is called the?
The Ohio Department of Highways is in the process of selecting a new paint for highway use. Four different paint companies have been contact regarding this need and each of the companies has supplied paint for testing.
Examining more than one independent variable. Would using several t-tests be appropriate test to use? If not, what would appropriate test be and why?
You will actually have negative sales using this multiple regression analysis
A big multinational corporation based in Toronto recently moved it's production facilities to Mexico. When the corporation was in Toronto, it had an older, experienced labour force with a mean age of 45 years.
Problem based on combinatory - how many different license plates are possible?
Plasma glucose levels are used to determine the presence of diabetes. Suppose the mean in (plasma-glucose) concentration (mg/dL) in 35-44 year olds is 4.86 with standard deviation = 0.54.
For each of the following statements, formulate appropriate null and alternative hypothese, indicate whether the appropriate test will be one-tail or two-tail, then sketch a diagram that shows the approximate location of the rejection region(s) fo..
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