SAMPLING Flashcards
Types of sampling designs
probablity - for making generalizations non probability(random) - used for descriptivepurposes
what sampling method is employed when households are selected at random and every person in each household is inculuded in the sample
cluster sampling
most basic randomized sampling design
simple random sampling
what is systematic sampling design
where every kth elementh of the population is chosen
types of data presentation
1) textual / narrative
2) tabular
3) graphical
uses symbols or pictures. used in showing distribution of morbidity across a GEOGRAPHIC AREA
Pictograph
correlation between 2 QUANTITATIVE DATA
ie: birth weight and AOG
dot diagram/scatterplot diagram
comparison of 2 POPULATION
ie ERAP income and GMA income
frequency polygon
presents trend data or changes with time or age with respect to other variables
trend
frequency distribution of continuous variable or measurement including age group
histogram
which graph is suitable to show the increasing cases of dengue from 2009-2015
Line graph
breakdown of a group with <6 categories; presented in PERCENTAGES
pie chart
used to prioritize problems; contains both bar graph and line graph
PARRETTO Chart
measures of central tendency
mean, median,mode
central tendency useful for bimodal distribution
mode
central tendency useful for skewed data
median
most common central tendency
mean
skewed distributions; skewed to the left
small outlying variables; neg skewed
Mean < Median < Mode
*opp for skewed to right
inferential statistics is composed of
hypothesis testing
estimation
Types of hypothesis
Null - you want to reject
Alternate - accept
Types of hypothesis error
Type 1(A) - rejects true hypothesis Type 2(B) -does not reject false hypothesis
process of computing the measures of population attributes based on data from sample
Estimation
Types of hypothesis error
Type 1(A) - rejects true hypothesis Type 2(B) -does not reject false hypothesis
process of computing the measures of population attributes based on data from sample
Estimation
