# Biomed Stats

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1. non-numeric or narrative info
qualitative data
2. numeric or quantifiable info (ex: weights of kindergartners)
quantitative
3. variable the researcher manipulates
independent variable
4. the variable the researcher is attempting to prove.
dependent variable
5. infinite number of values between two points
cannot be 1.5 children, etc...
discrete variable
6. has, in theory, an infinite number of values between two points
ex: body temp
continuous variable
7. NOIR
• nominal
• ordinal
• interval
• ratio
8. lowest level
assigns characteristics into categories
nominal or named variable
9. next in hierarchy of measurement
rank order of variable along some dimension
ordinal or Order
10. attribute is rank-ordered on a scale that has equal distances between points on that scale
interval = equal distances
11. equal distances between score units and which has a true, meaningful zero point
(a true ratio can be calculated)
ratio measurement
12. higher levels of measurement provide ...
• can be analyzed with more powerful stat tools
13. a subset of a population
ideally selected to be representative of the population
sample
14. the entire set of individuals having common characteristics
population
15. used to describe and summarize data set
allows us to describe, compare, determine a relationship
usually straightforward
descriptive
16. draw conclusion about a single variable in a population
evaluate relationships between variables
are the relationships "real"?
inferential
17. Type of stat that measures:
existence of relationship between x and y
magnitude of the strength of relationship
the nature of the relationship
inferential stats
18. one variable being described
univariate
19. two variables being compared
bivariate
20. more that two variables being compared
multivariate
21. Name the two kinds of frequency
• absolute
• relative
22. symbol: f
number of times a score occurs
absolute frequency
23. most commonly percent %=(f/N) X 100
proportion of times a score occurs
relative frequency
24. Name the 5 basic shapes of charts
• modality
• symmetry and skewness
• kurtosis
• central tendency
• variability
25. modality
• peaks or high points in the data
• unimodal
• bimodal
• multimodal
26. draw a line through the center and produces mirro images
symmetrical
27. distribution is lopsided or skewed
asymmetrical
28. the skewed tail points to the right
positive skewness
29. the skewed tail points to the left
negative skewness
30. refers to how pointy the peak of distribution
how concentrated the middle of the distribution
• kurtosis
•   platykurtic (low, flattened)
•   leptokurtotic (high narrow)
31. Ideal distribution
bell-shaped curve
unimodal
symmetrical
normal distribution
32. when do you use a bar graph?
discrete info
33. when do you use a histogram
continuous info
34. the point at 25% below and 75% above the median
Quartile 1 (Q1)
35. the point at 50% below and 50% above the median
Quartile 2 (Q2)
36. the point at 75% below and 25% above the median
Quartile 3 (Q3)
 Author: cbennett ID: 300420 Card Set: Biomed Stats Updated: 2015-04-10 18:21:32 Tags: biomed stats Folders: Description: Biomed Stats Show Answers: