# Stats 1040 final

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1. class width
2. Relative frequency
P(x)
3. Frequency polygon
use midpoints, line graph, make sure each end of line is touching x-axis by adding more classes.
4. Frequency histogram
bar graph, use midpoints, bars are touching
5. Pareto Chart
bar graph, bars aren't touching because it isn't numerical data.
6. Empirical Rule
68, 95, 99.7
7. Mean
Σ(x·f) / Σf
8. Standard Deviation
Square root  (  )
9. IQR
Q3-Q1
10. Outliers
(1.5·IQR)+Q3
11. Ogive (cumulative frequency graph)
use class boundaries (little bit below actual class) and cumulative frequency, line graph
12. Chebychev's theorem
= at least how many outcomes
13. Percentile
number of values below given value
14. P(x or y)
P(x) + P(y)
15. P(x and y)
P(x) · P(y)
16. defective units and what not
number of good C number of good wanted x number of bad C number of bad wanted.

For probability divide by number of total units C number of units wanted.
17. P(x) - binomial distribution
P(x) =
18. Mean- given probability distribution
mean= Σ(x·p(x))
19. Standard deviation- given probability distribution
square root (Σ((x-mean)^2·P(x)))
20. z-score
21. mean- binomial distribution
n · p
22. standard deviation- binomial distribution
square root (n · p · q)
23. equation of regression line

24. correlation coefficient (r)
• -1<0<1
• negative # means negative correlation
• positive # means positive correlation

• Closer the number is to zero the weaker the correlation.
• And the closer the number is to -1 or 1 the stronger the correlation
 Author: Anonymous ID: 301888 Card Set: Stats 1040 final Updated: 2015-05-01 06:14:28 Tags: Stats1040 Folders: Statistics Description: Stats 1040 final Show Answers: