Statistics For Dummies at University Of West Alabama | Flashcards & Summaries

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Lernmaterialien für Statistics for Dummies an der University of West Alabama

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What is a Research Hypothesis
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A statement that a relationship exists between the variables being studied.
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What is a Directional Research Hypothesis?
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A statement that there is a difference between the variables being studied, and states the direction of the difference (one-tailed).
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What is a Non-Directional Research Hypothesis?
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A statement that there is a difference between variables being studied, but does not specify the direction of the difference (2-tailed).
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What are the measures of central tendency?
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Mean, median, mode
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What is the Mean, and what letter represents it?
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M or X (with a line across the top). The center point. The sum divided by the total #of scores.
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What are the pros and cons of the Mean?
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Sensitive to extreme scores. Good to use when the data is not categorical.
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What is the Median, and what letter represents it?
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Med or Mdn. The midpoint. 50% of scores are above, and 50% are below.
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What is good about the Median?
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Less sensitive to extreme scores.
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What is the Mode?
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The value that appears most frequently.
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When is it good to use the mode?
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When the data is categorical.
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What is a normal curve, and what are it's characteristics?
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A bell shaped curve.
1. Mean, median, and mode all equal
2. Symmetrical about the mean
3 tails are Asymtotic, meaning they get closer and closer to the horizontal axis but never touch.
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What is a Null Hypothesis
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A statement that there is no difference between the variables being studied, other than by chance.
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  • 139 Karteikarten
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Beispielhafte Karteikarten für deinen Statistics for Dummies Kurs an der University of West Alabama - von Kommilitonen auf StudySmarter erstellt!

Q:
What is a Research Hypothesis
A:
A statement that a relationship exists between the variables being studied.
Q:
What is a Directional Research Hypothesis?
A:
A statement that there is a difference between the variables being studied, and states the direction of the difference (one-tailed).
Q:
What is a Non-Directional Research Hypothesis?
A:
A statement that there is a difference between variables being studied, but does not specify the direction of the difference (2-tailed).
Q:
What are the measures of central tendency?
A:
Mean, median, mode
Q:
What is the Mean, and what letter represents it?
A:
M or X (with a line across the top). The center point. The sum divided by the total #of scores.
Mehr Karteikarten anzeigen
Q:
What are the pros and cons of the Mean?
A:
Sensitive to extreme scores. Good to use when the data is not categorical.
Q:
What is the Median, and what letter represents it?
A:
Med or Mdn. The midpoint. 50% of scores are above, and 50% are below.
Q:
What is good about the Median?
A:
Less sensitive to extreme scores.
Q:
What is the Mode?
A:
The value that appears most frequently.
Q:
When is it good to use the mode?
A:
When the data is categorical.
Q:
What is a normal curve, and what are it's characteristics?
A:
A bell shaped curve.
1. Mean, median, and mode all equal
2. Symmetrical about the mean
3 tails are Asymtotic, meaning they get closer and closer to the horizontal axis but never touch.
Q:
What is a Null Hypothesis
A:
A statement that there is no difference between the variables being studied, other than by chance.
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