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For the following population of N=10 scores
14,6,8,3,9,12,1,6
a) Sketch a histogram showing the population distribution
b) Locate value of the population mean in your sketch and make an estimate of the standard deviation
c) Compute sum of square (SS), variance, and standard deviation for the sample.
Find the equation of least -squares line and plot the line on the scatter diagram of part (a)
What is the relevance of Pearson's r? What does it tell you about the correlation between variables? What is one example of a null hypothesis and the research hypothesis that goes with it?
Multiple choice questions based on multiple regression - Find the coefficient of determination for the above model
Define correlation. Then give an example of a misleading correlation and an example of a meaningful correlation. With this describe the relationship between correlation and causation.
Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution. Use a =.05 and .01 and perform a goodness of fit test.
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
What is the probability of a fatal accident over a lifetime?
You've administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items.
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
Interpret a scatter diagram - Explain the relationship between the hours each student of a school spends in after school jobs each week and their grade average.
An electronic test equipment manufacturing company markets a certain piece of specialty equipment. The company has several competitors who currently market similar pieces of equipment.
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