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Validity: True story: I once spoke to a retired professor who used to teach general studies geography. His grading technique was to throw the papers/tests on the ground and randomly assign the same grade to each pile (without even reading the papers/tests). If students were not happy with the grade, they could write a little paper justifying why they should receive a higher grade. He assigned grades on the basis of those papers.
What data would this professor have to collect to show that his grading method meets the criteria for each type of validity?
Suppose that the miles-per-gallon (mpg) rating of passenger cars is a normally distributed random variable with a mean and a standard deviation of 36.6 and 3.7 mpg, respectively. What is the probability that a randomly selected passenger car gets m..
The heights of 10 sixth graders are listed in inches: {53, 61, 54, 60, 58, 62, 55, 58, 59, 56}. Find the mean, median, mode, sample variance, and range.
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time.
Management at the Kansas City Corporate office for tax prepration wants to accomplish a business objective by conduting a study of the waiting time in its tax offices in different states.
Find the rectangular coordinates of the point Q(-5, -35°) and Write the rectangular equation x2 + y2 = 9 in polar form
a building is designed to resist loading from earthquakes. the capacity in terms of force factor is assumed to follow a
You draw 13 cards and not one of them is Saddam Hussein [note: this is a tough one, remember to show your work so you can get partial credit. Grading will be lenient on this one].
Enter the data into R, and calculate the means for placebo and epinephrine. Find a 95% confi dence interval for the mean diff erence in cholesterol levels between the placebo and epinephrine. Use the confi dence interval to test your null hypothes..
Use α = 0.10 and assume that the population is normally distributed. Write a paragraph that interprets the test's decision.
The following data show the advertising expenses (expressed as a percentage of total expenses) and the net operating profits (expressed as a percentage of total sales) in a random sample of six drugstores:
what is the correlation between leadership trustworthiness and ethical stewardship? support your
Suppose the score of architects on a partecular creativity test are normally distributed. What percetage of architects have a Z scores (A) above .10.
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