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MA 115
Final Vocab
39
Mathematics
Undergraduate 2
12/12/2009

Additional Mathematics Flashcards

 


 

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Term
descriptive stats
Definition
how to collect, sumarize, analyze data w/ graphs/numerical methods
Term
inferential stats
Definition
derived from descriptive stats & probability- make generalization, conclusions, decisions
Term
variable
Definition
characteristic/subset of population
Term
parameter
Definition
summary measure that is computer to describe char. of population
Term
rounding up
Definition
always round up- not normal rules
Term
rounding off
Definition
normal rounding rules
Term
nominal categorical
Definition
(qualitative) if categories can't be ordered (m f)
Term
ordinal categorical
Definition
(qualitative) if categories can be ordered (letter grade)
Term
discrete numerical
Definition
(quantitative) assumes finite or countable possible values
Term
continuous numerical
Definition
(quantitative) infinite, noncountable possible values (time)
Term
class
Definition
category/group into which data classified
Term
ogive
Definition
graph of cumulative distribution
Term
0 skew data
Definition
symmetrical- x=M=m
Term
positive skewed data
Definition
right skewed- m
Term
negative skewed data
Definition
left skewed- m>M>x
Term
empirical rule
Definition
(data symmetrical) 68% fall w/in 1 SD, 95% fall w/in 2SD, 99.7% fall w/in 3SD
Term
empirical rule for z scores
Definition
68% have z scores between -1&1, 95% bt -2&2, 99.7% bt -3&3
Term
z scores: mild outlier | extreme outlier
Definition
z score bt 2 &3 | z score above 3. more sensitive than quartile method
Term
quartiles: mild outlier | extreme outlier
Definition
bt UIF/UOF or LIF/LOF | past UOF or LOF
Term
5 number summary
Definition
x min, Q1, M, Q3, x max
Term
pareto chart
Definition
descending- only for categorical data
Term
statistical experiment
Definition
any process that can be repeated, has 1 single outcome, result cannot be predicted w/ certainty
Term
simple event
Definition
any single outcome of a stat. exp. for ex Heads or Tails
Term
unusual event | usual event
Definition
has prob <0.05 | has prob ≥ 0.05
Term
events are independent
Definition
if P(A|B)=P(A) or P(AandB)=P(A)xP(B)
Term
events are mutually exclusive
Definition
if P(A&B)=0
Term
discrete random variable | continuous random variable
Definition
countable (finite or infinite) | uncountable (interval)
Term
confidence coefficient
Definition
1-alpha
Term
confidence level
Definition
(1-alpha)100%
Term
CVs corresponding to Cls
Definition
90%-1.645; 95%-1.96; 99.7%-2.575
Term
type I error
Definition
a true Ho is rejected
Term
type II error
Definition
a false Ho is accepted
Term
if µ falls in CI
Definition
accept Ho
Term
if p-value ≤ alpha
Definition
reject Ho
Term
IQR vs sigma
Definition
IQR better when skewed
Term
bernouilli experiment
Definition
has single trial & only 2 mutually exclusive outcomes (M&F), P(Success) is same in each trial, all trials are independent
Term
binomial skewness
Definition
p>0.5- left skewed; p=0.5- sym; p<0.5- right skewed
Term
if µ is in CI
Definition
accept Ho
Term
if no info about ˆp
Definition
ˆp=0.5
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