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To test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in showed a mean score of 69.3 with a standard deviation of 24.9. Is this a significant difference at a = .05? (a) State the hypotheses for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances. Interpret these results. (c) Is the difference in mean scores large enough to be important? (d) Is it reasonable to assume equal variances? (e) Carry out a formal test for equal variances at a = .05, showing all steps clearly.
Describe at least two examples of how human behavior changes based on social situations.
One 1/2 page space only, in graphic form (picture), show from an aerodynamic point of view why an aircraft is flying and staying up in the air? I assume you all have traveled by air and perhaps have asked yourself the question how come that this imme..
q1. alcohol evaporates more quickly than water at the same temperature. which produces more cooling- alcohol or the
Entamoeba histolytica and Giardia lamblia were isolated from the stool sample of a 45- year- old man, and Shigella sonnei was isolated from the stool sample of an 18- year- old woman. Both patients experienced diarrhea and severe abdominal cramps, an..
develop 2-slide microsoftreg powerpointreg presentation with additional title and reference slides on nutritional needs
Early earth was being bombarded by meteorites, comets, and asteroids. was early earth an open or closed system?
why is it said that electronic commerce is a catalyst of fundamental changes in organizations?search the ashford online
If you had an air mass of 10 cubic meters which was saturated at 80 degrees F and then cooled the air to 60 degrees F, how much water vapor would have condensed? Show your the formula and calculations.
What is the average upwelling speed
Clarify as much as possible Aristotle's distinction between practical knowledge and theoretical knowledge. Does an understanding of this distinction help account for why persons who know certain habits or behaviors are harmful, still persist i..
The term resource mobilization refers to a way of looking at social movements
Thoroughly discuss advantages and disadvantages of each system and explain how exchange rates are determined under each system.
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