Study Guides (390,000)

CA (150,000)

U of G (8,000)

SOAN (200)

SOAN 2120 (90)

David Walters (30)

Study Guide

School

University of GuelphDepartment

Sociology and AnthropologyCourse Code

SOAN 2120Professor

David WaltersStudy Guide

FinalThis

**preview**shows pages 1-3. to view the full**32 pages of the document.**U of G

SOAN 2120

FINAL EXAM

STUDY GUIDE

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

Soan2120

Sept28

Standard deviants

Whatever comes before the decimal point is stem.

3 (Stem) .94 (leaf)

stem=vertical on the table

lead=horizontal

-stems in ascending order vertically

-too many of them? two rows for each stems, two rows of leaves

-example: 0 to 4 and 5 to 9

population = parameters

sample = statistics

measures of central tendency

-mean, median and mode

mean: average of the data set, take all the data, add it up and divide it up to however many

data there are

population mean: greek letter lower case letter U

x

i= what value to begin with

xi=what part of the data set to use

what parts of the data set to use: i=1

n: number of values in the data set

i=1 : means start with 1

sigma of x means add all values in data set // then divide with N

sigma is add

z: reminds you to use values from the data set

i: tells you which values to starts with

n: is the number of value in the data set

median: the number in the middle

find more resources at oneclass.com

find more resources at oneclass.com

###### You're Reading a Preview

Unlock to view full version

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

even numbers? The ones in the between like 11,12 = median would be 11.5

mode: most frequently occuring number

how spread out the data is = measures of variability

range: highest value – lowest value

deviation: how far a measurement is from the mean or

deviation: x - x with – on top (mean)

variance: mean of population is lower case u vs mean of sample is x with – on top

population variance is o2

standard deviation:

z-scores

- Every observation can be converted to a z-score

- Z-scores can indicate whether an observation is statistically significantly different from

the mean

- Z-scores can be positive or negative. Negative = less than the mean vs positive = more

than the mean

How it works?

- A x-sore tells us ho ay sd’s a oseratio is fro the ea

- 95% all observations plus or minus 2 standard deviations of the mean

- 99% of all observation lie within plus or minus 2.6 standard deviations of the mean

thus,

- if a oseratio’s z-score is plus or minus 2 standard deviation from the mean, then

(p<.0.5) 95%

- if a oseratio’s z-score is more than plus or minus 2.6 standard deviation from the

mean then (p<0.1) 99%

how do we know if an individual is statistically significant different from the mean?

- First we calculate a mean

- Then we calculate a variance/ standard deviation

- Calculate a z-score for the individual

find more resources at oneclass.com

find more resources at oneclass.com

###### You're Reading a Preview

Unlock to view full version