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A guy took a sample of 10 midterm exam scores from a class of 30 students. The 10 scores are shown in the table below:
95
67
76
47
85
70
87
80
72
a) What is the sample mean?
(b) What is the sample standard deviation? (Round your answer to two decimal places)
(c) If you leveraged technology to get the for part (a) and/or part (b), what technology did you use? If an online applet was used, please list , and describe the steps. If Excel was used, please write out the function.
Prepare tables of descriptive statistics (mean, median, Quartiles, IQR, and Standard Deviation) by firm for net profit margin (PROFITS). Discuss.
The vehicle speeds at a particular interstate location can be described by a normal curve. The mean speed is 67 mph, and the standard deviation is 6 mph.
A graduate student in English literature uses random 500-word passages from the writings of Shakespeare and Marlowe to determine which author
Use a formula to calculate a total for each month of expenses. Beside the column add another column for calculating the percent of the budget for each expense category.
Robotics manufacturers can design mobility features in one of several ways. Robots can have legs, wheels, both legs and wheels, or no legs or wheels.
A high-speed packing machine can be set to deliver between 11 and 13 ounces of a liquid. For any delivery setting in this range the amount delivered.
Is this an observational or an experimental study?- Describe the population and the sample in this problem.- Is this a random sample? Justify your answer.
What would be your estimate of how many data points we would need to start seeing that bell curve?
quantitative research questiondownload gpower and play around with it. see how changes in assumptions and parameters
Find that the mean weight in the sample is 308 pounds.The standard deviation is 23. Using significance level of .01 test the null hypothesis using 5-step procedure.
Illustrate how you would use this fact to calculate the fifth residual knowing only the values of the other four.
Find the height/level of the tree and how many leaves does the tree have
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