# PSY 210 Quiz 1

The flashcards below were created by user blueclues on FreezingBlue Flashcards.

1. Parameter
quantity calculated from a population
2. Statistic
quantity calculated from a sample
3.
Sigma: Population Standard Deviation
4. Sigma
Symbol for population deviation
5. 2
Sigma Squared: Population Variance
6. Sigma Squared
Population Variance
7. mu: population mean
8. mu
population mean
9. Population Variance
variance of the population - usually estimated, rarely computed
10. Population
Set of all objects that we're interested in researching
11. Standard Deviation
square root of the variance
12. Sample
Subset of the population; set of the actual observations
13. Significance
results are unlikely to have occured by chance alone
14. Random Sample
each member of the population has an equal chance of being included
15. sample mean
16. s2
Sample Variance
17. s
Sample Standard Deviation
18. X
Individual Observation; Raw Score
19. Central Limit Theorem (CLT)
Given a population with finite mean mu and finite variance sigma squared, the sampling distribution of the mean approaches a normal distribution with the mean mu and variance sigma squared divided by N, as N, the sample size, increases
20. Measures of Central Tendency (3 Ms)
Mean

Median

Mode
21. Mean
arithmatic average: The sum of the scores divided by the number of scores
22. Median
Middlemost score
23. Mode
the most frequently occuring score
24. abscissa
x axis; horizontal axis
25. ordinate
y axis; vertical axis
26. Histogram
bar chart
27. N
the number of observations
28. Normal Distribution
Bell Curve; Mesokurtic
29. Frequency Distribution
Frequency Polygon
30. Skewed Distribution - Skewness
a skewed bell curve; a measure of the degree to which a distribution is asymmetrical
31. Kurtosis
levelness/flatness around the mode of a frequency distribution
32. Leptokurtosis
more scores in the tails and fewer in the middle as compared to the corresponding normal distribution

most commom with small sample sizes
33. Platykurtic Distribution
more scores in the middle and fewer scores in the tails as compared to the normal corresponding distribution

34. What type of Distribution is this???
Bimodal

35. What type of Distribution is this???
Leptokurtic Distribution

36. What type of distribution is this???
Uniform Distribution
37. Measures of Dispersion
Range

Variance

Standard Deviation
38. Range
Largest score minus the smallest score
39. Variance
average of the square deviations from the mean
40. Z Distribution
Standard Normal Distribution
 Author: blueclues ID: 161795 Card Set: PSY 210 Quiz 1 Updated: 2012-07-11T03:03:26Z Folders: Description: Statistics Ch 1 - 4, 7 Show Answers: