Please enable JavaScript.
Coggle requires JavaScript to display documents.
FUNDAMENTAL OF STATISTICS (HISTOGRAM (Collect data & construct a tally…
FUNDAMENTAL OF STATISTICS
DEFINITION
A collection of quantitative data pertaining to a subject/group
TWO PHASES
Descriptive Statistics
Inferential Statistics (Inductive)
TYPES OF DATA
ATTRIBUTE
Binary in nature
Qualitative data
:green_cross: / :check:
VARIABLE
Discrete ( :eye: :nose::skin-tone-3: ) VS Continuous (:weight_lifter::skin-tone-2:)
Quantitative data
Measurement information
SIGNIFICANT FIGURES
To indicate the amount of variation of number
3.69 - 3 significant digits
ACCURACY & PRECISION
Accuracy = How close a measured value to its 'true' value
Precicion = How reproducible is the measurement value
FREQUENCY DISTRIBUTION
Categorical
Primarily for nominal, ordinal level data
Ex : blood type
Ungrouped
Range is SMALL
Ex : no of miles travel
Grouped
Range of data is LARGE
Ex : the life of boat batteries in hours
HISTOGRAM
Collect data & construct a tally sheet
Determine the range, R
Determine the cell interval, i
Determine the cell midpoints
Determine the cell boundaries
CENTRAL TENDENCY
Mean
Ungrouped data
Grouped data
Weighted average
Median
50th percentile
Mode
Value that occurs with greatest frequency :
DISPERSION
Range
Standard deviation
Variance
POPULATION & SAMPLE
Population = Set of ALL items that possess a characteristics of interest
Sample = Subset of a population
