PROB AND STATS NOTES.docx - Adam Abdou Notes 7.No bias...

Adam Abdou
Notes
7.No bias
8.Bias
9.Flawed
12.Sound
13.PS
14.SS
21.Yes, it woulden’t make sense
22.whether there is a correlation between the subject and brain volume
23. No benefit unbias
24. No larger brain volume does not cause a higher IQ score.
Section 1.3
8.Statistic
10.Parameter
11. Statistic
14.Descrete
15. Discrete
15.Continous
26.Nominal
27.Ordinal
28.Interval
12-20, 23-26,30
12.systematic
13.Convineice
14.Random
15. Systematic
16. Cluster
17.Random
18.Cluster
19.Convienence
20.Systematic
23.Simple Random
24.Simple Random
25.Not simple random
26. Not simple random
30.Perspective

10/13/20
Pets
dsfs
Highest-lowest =6-0
In mathematics a formula is an equation that contains more than one v
19.A=

3.2 Notes
Measure of Center
A measure of center is a value at the center or
middle of a data set.
Mean (or Arithmetic Mean)
The mean (or arithmetic mean) of a set of data
is the measure of center found by adding all of
the data values and dividing the total by the
number of data values.
Important Properties of the Mean
Sample means drawn from the same population
tend to vary less than other measures of center.
The mean of a data set uses every data value.
A disadvantage of the mean is that just one
extreme value (outlier) can change the value of
the mean substantially. (Using the following
definition, we say that the mean is not resistant.)
Resistant
A statistic is resistant if the presence of
extreme values (outliers) does not cause it to
change very much.
Notationidenotes the sum of a set of data values.
x is the variable usually used to
represent the individual data values.
n represents the number of data values
in a sample.