SJSU Final Exam Bio 155/55 Questions and Correct Verified Answers Latest Version
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Course
SJSU
Institution
SJSU
2 x 2 Table
2 variables:
-1 variable: treatment/ Intervention/ Factor
-2nd variable: outcome/ Event
There are frequencies analyzed in a 2 x 2 contingency table
Risk
-Probability an event will occur
-Risk in one group: # of individuals with the outcome/ total # of
individuals in that ...
✓ -R.A. Fisher wrote a book in 1925 he put statistical tables used to
determine statistical significance
✓ -Needed a separate table for each df which was too many
✓ -He chose alpha= 0.05
✓ -Is arbitrary, feels reasonable, it works, socially accepted
✓ -intended as a first look
✓ -If alpha = 0.02 that means there is a 2% chance of making a type one
error. Decreasing type one error we increase the chance of a type two
error ( missing significant findings )
Using Alpha and Null Hypothesis significance Testing( NHST)
✓ -Caused by the p-value there is dichotomy( 2 outcomes ) which are
significant p< alpha and non significant p> alpha
✓ -Significant also called positive findings ( most published)
✓ -non significant also called negative findings (put in the file drawer)
Importance of negative findings
Master01 | September, 2024/2025 | Latest update
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